Sale of Stock [Axis] Initial Public Offering [Member] Private Placement [Member] Related Party [Axis] Initial Stockholders [Member] Over-Allotment Option [Member] Underwriters [Member] Trust Account [Member] Subsequent Event Type [Axis] Subsequent Event [Member] Type of Arrangement and Non-arrangement Transactions [Axis] Trust Agreement [Member] Range [Axis] Minimum [Member] Maximum [Member] Affiliates [Member] Outside Trust Account [Member] Major Types of Debt and Equity Securities [Axis] US Treasury Securities [Member] Debt Instrument [Axis] Unsecured Promissory Note [Member] Legal Entity [Axis] M SPAC LLC, M SPAC Holdings I, LLC and M SPAC Holdings II, LLC [Member] Underwriting Agreement [Member] M SPAC Holdings I LLC [Member] Affiliated Entity [Member] Contribution Agreement (the "Purchase Agreement") [Member] Business Acquisition [Axis] Priority Investment Holdings, LLC and Priority Incentive Equity Holdings, LLC [Member] Promote Agreement [Member] Founding Stockholders (the ''Founders'') [Member] Letter Agreement [Member] Equity Components [Axis] Founders' shares [Member] $100 Unit Purchase Option [Member] Demand and "Piggy Back" Registration Rights [Member] Priority Holdings, LLC [Member] Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Trading Symbol Document Period End Date Amendment Flag Current Fiscal Year End Date Entity a Well-known Seasoned Issuer Entity a Voluntary Filer Entity's Reporting Status Current Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] Assets Current Assets: Cash and cash equivalents Prepaid expenses and other current assets Total current assets Cash and cash equivalents held in trust Total Assets Liabilities and Stockholders' Equity Current Liabilities: Accounts payable and accrued expenses Offering costs payable Note payable Note payable - related parties Total Current Liabilities Deferred underwriting fee payable Total Liabilities Commitments Common stock subject to possible conversion (4,672,795 and 4,705,821 shares at conversion value as of March 31, 2018 and December 31, 2017, respectively) Stockholders' Equity: Preferred stock, $0.001 par value; 1,000,000 authorized none issued and outstanding Common stock, $0.001 par value; 30,000,000 shares authorized; 2,385,948 and 2,352,922 shares issued and outstanding (excluding 4,672,795 and 4,705,821 shares subject to possible conversion) at March 31, 2018 and December 31, 2017, respectively Additional paid in capital Accumulated deficit Total Stockholders' Equity Total Liabilities and Stockholders' Equity Common stock subject to possible conversion Preferred stock, par value (in dollars per share) Preferred stock, authorized Preferred stock, issued Preferred stock, outstanding Common stock, par value (in dollars per share) Common stock, authorized Common stock, issued Common stock, outstanding Common stock excluding subject to possible conversion Income Statement [Abstract] EXPENSES Administration fee - related party Operating costs TOTAL EXPENSES OTHER INCOME Interest income TOTAL OTHER INCOME Net loss Net loss per share of common stock - basic and diluted (in dollars per share) Weighted average shares of common stock outstanding - basic and diluted (in shares) Statement of Cash Flows [Abstract] Cash Flows From Operating Activities: Net loss Adjustments to reconcile net loss to net cash used in operating activities: Interest earned on cash and securities held in Trust Account Changes in operating assets and liabilities: Prepaid expenses Accounts payable and accrued expenses Net Cash Used In Operating Activities Cash Flows From Investing Activities: Cash deposited into Trust Account Interest released from Trust Account Net Cash (Used In) Provided By Investing Activities Cash Flows From Financing Activities: Proceeds from related party note Net Cash Provided By Financing Activities Net change in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental disclosure of non-cash financing activities: Change in common stock subject to possible conversion Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Plan of Business Operations and Going Concern Consideration Accounting Policies [Abstract] Significant Accounting Policies Initial Public Offering Initial Public Offering Private Units Private Units Payables and Accruals [Abstract] Notes Payable Notes Payable - Related Parties Notes Payable - Related Parties Commitments and Contingencies Disclosure [Abstract] Commitments Equity [Abstract] Stockholder's Equity Subsequent Events [Abstract] Subsequent Events Basis of presentation Emerging Growth Company Cash and Cash Equivalents Marketable securities held in Trust Account Fair value of financial instruments Use of Estimates Concentration of credit risk Net Loss Per Common Share Common stock subject to possible conversion Income Taxes Related Parties Subsequent Events Recent Accounting Pronouncements Schedule of reconciliation of net loss per common share Statement [Table] Statement [Line Items] Number of units issued Gross proceeds from issuance Net proceeds from offering Transaction costs of offering Shares price (in dollars per share) Issuance costs Deferred underwriting fee Amount of business transaction Minimum net tangible assets proceed with business combination Percentage of conversion rights Percentage of shares sold Deposit Maximum costs of liquidation Interest income Working capital deficit Less: Income attributable to common shares subject to conversion Adjusted net loss Weighted average shares outstanding, basic and diluted (in shares) Basic and diluted net loss per common share (in dollars per share) Marketable securities Maturity description Number of shares excludes subject to possible conversion Interest income Federal income tax rate Previous federal income tax rate Proceeds from public offering Number of units issued, value Shares issued price per share Description initial public offering Stock issuance cost Number of shares issued Gross proceeds from issuance Principal amount Description of interest rate terms Description of payments terms Repayment of debt Debt interest rate terms Description of underwriting discount Number of beneficial interest Administrative service fee Percentage of interests acquired Payments to acquire businesses Business acquisition, share price (in dollars per share) Description of assets aquires term Adjusted EBITDA Number of equity issued in acquisition (in shares) Number of equity issued in acquisition in first earn out (in shares) Number of equity issued in acquisition in second earn out (in shares) Description equity interest issued Number of shares issued in transaction (in shares) Number of new shares issued (in shares) Aggregate purchase price Number of shares forfeit Number of shares issued, value Maximum number of shares forfeiture Description of escrow shares Number of shares forfeited and cancelled Cash receipt Sale of stock (in dollars per unit) Expiration period Fair value Fair value (in dollars per unit) Expected volatility Risk-free interest rate Expected life Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests. Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests. Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests. Information about agreement. Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests. Information by type of related party. Refers to deferred underwriting fee incurred during the period. Percentage of conversion rights. Refers to percentage of shares sold. Refers to cost of liquidation incurred during the period. Refes to number of shares excludes subject to possible conversion during the period. Represents investment income interest. Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Description of initial public offering terms. Refers to gross proceeds from issuance during the period. Debt obligation not collateralized by pledge of, mortgage of or other lien on the entity's assets. Information related to entity. Information about agreement. Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests. Refers to description of underwritting discount, Information related to agreement. Represents the aggregation and reporting of combined amounts of individually immaterial business combinations that were completed during the period. Information related to agreement. Information about related party. Information related to agreement. Description of assets aquires term Amount of adjusted earnings before interest taxes depreciation and amortization. Number of shares of equity interests issued or issuable to acquire entity. Number of shares of equity interests issued or issuable to acquire entity. Information related to founders shares. Information by type of sale of the entity's stock Represents demand and piggy back registration rights. Refers to maximum number of shares forfeiture during the period. Description about escrow shares, It represents number of shares forfeited and cancelled during the period. Refers to cash inflow associated with transaction. Refers to expiration period, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Refers to fair value of offering transaction. Information about legal entity. Refers to the amount related to cash and cash equivalents held in trust as on balance sheet date. Refers to the amount related to accrued offering costs payable as on balance sheet date. Refers to amount of interest earned on cash and securities held in trust account incurred during the period. Refers to the amount of cash deposited into trust account. Represents interest released from trust account. The entire disclosure of initial public offering. The entire disclosure of private units. Disclosure of accounting policy of emerging growth company. The entire disclosure of common stock subject to possible conversion policy. The entire disclosure of related parties policy. Assets, Current Assets [Default Label] Liabilities, Current Liabilities Stockholders' Equity Attributable to Parent Liabilities and Equity Operating Expenses Nonoperating Income (Expense) Increase (Decrease) in Prepaid Expense Increase (Decrease) in Accounts Payable and Accrued Liabilities Net Cash Provided by (Used in) Operating Activities PaymentsForCashDepositedIntoTrustAccount InterestReleasedFromTrustAccount Net Cash Provided by (Used in) Investing Activities Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) InitialPublicOfferingTextBlock PrivateUnitsTextBlock Related Party Transactions Disclosure [Text Block] Commitments Disclosure [Text Block] CommonStockSubjectToPossibleConversionPolicyTextBlock Subsequent Events, Policy [Policy Text Block] Investment Income, Interest and Dividend Preferred Stock Dividends, Income Statement Impact Net Income (Loss) Available to Common Stockholders, Basic InvestmentIncomeInterest1 Proceeds from sale of private units