Related Party [Axis] Sponsor [Member] Sale of Stock [Axis] Initial Public Offering [Member] Warrants [Member] Financial Instrument [Axis] Trust Account [Member] Private Placement [Member] Over-Allotment Option [Member] Sale of Stock [Axis] Purchase Option [Member] Class of Stock [Axis] Founder Shares [Member] Geographical [Axis] KK [Member] Cash and Cash Equivalents [Axis] Money Market Funds [Member] US Treasury Securities [Member] Equity Components [Axis] Common Stock Retained Earnings / Accumulated Deficit Common Class B [Member] Document And Entity Information Entity Registrant Name Entity Central Index Key Trading Symbol Amendment Flag Current Fiscal Year End Date Document Type Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Filer Category Entity Ex Transition Period Entity Small Business Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Statement of Financial Position [Abstract] Assets Cash Prepaid assets Total Current Assets Cash and investments held in Trust Account Total assets Liabilities and Shareholders' Equity Accounts payable and accrued expense Due to related parties Promissory note - related party Total current liabilities Deferred underwriting compensation Total Liabilities Commitments and Contingencies Ordinary shares subject to possible redemption, 10,593,284 and 10,603,302 shares at March 31, 2019 and December 31, 2018 (at conversion value of $10.10 and $10.04 per share), respectively Shareholders' Equity: Preferred shares, no par value; 100,000,000 shares authorized; no shares issued and outstanding Ordinary shares, no par value; 300,000,000 shares authorized; 4,096,466 and 4,086,448 shares (excluding 10,593,284 and 10,603,302 shares subject to possible redemption) at March 31, 2019 and December 31, 2018, respectively Retained earnings Total shareholders' equity Total Liabilities and Shareholders' Equity Ordinary shares, par value Shares subject to possible redemption Preferred shares, par value Preferred shares, shares authorized Preferred shares, shares issued Preferred shares, shares outstanding Ordinary shares, par value Ordinary shares, shares authorized Ordinary shares, shares issued Ordinary shares, shares outstanding Income Statement [Abstract] Operating costs Loss from operations Other income Interest income - bank Interest income Total other income Net income Less: income attributable to ordinary shares subject to possible redemption Adjusted loss Basic and diluted weighted average shares outstanding Basic and diluted net loss per share Condensed Statements Of Operations Unaudited Ordinary shares subject to possible redemption Statement [Table] Statement [Line Items] Ordinary Shares Retained Earnings Balance Balance, Shares Issuance of ordinary shares to one director upon formation on March 23, 2018 Issuance of ordinary shares to one director upon formation on March 23, 2018, Shares Change in ordinary shares subject to possible redemption Change in ordinary shares subject to possible redemption, Shares Net income Balance Balance, Shares Statement of Cash Flows [Abstract] Cash Flows from Operating Activities: Adjustments to reconcile net income to net cash used in operating activities: Interest earned on investments held in Trust Account Changes in current assets and current liabilities: Prepaid assets Accounts payable and accrued expense Due to related parties Net cash used in operating activities Net Change in Cash Cash – Beginning of period Cash – End of period Supplemental Disclosure of Non-cash Financing Activities: Change in value of ordinary shares subject to possible redemption Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Business Operations Significant Accounting Policies Significant Accounting Policies Initial Public Offering [Abstract] Initial Public Offering Private Placements [Abstract] Private Placements Related Party Transactions [Abstract] Related Party Transactions Notes to Financial Statements Cash and Investments Held in Trust Account Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Equity [Abstract] Shareholder’s Equity Earnings Per Share [Abstract] Reconciliation of Loss per Ordinary Share Subsequent Events [Abstract] Subsequent Events Significant Accounting Policies Basis of Presentation Use of Estimates Cash and Cash Equivalents Investments Held in Trust Account Ordinary Shares Subject to Possible Redemption Income Taxes Net Loss per Ordinary Share Concentration of Credit Risk Fair Value of Financial Instruments Recent Accounting Pronouncements Offering Costs Schedule of gross holding gains and fair value of held-to-maturity securities Schedule of portion of income that is attributable to ordinary shares subject to redemption Organization and Business Operations (Textual) Consummated initial public offering of units Generating gross proceeds from initial public offering Sale of units Sale of price per unit Generating gross proceeds from private placement Purchase of additional units Gross proceeds from sale of private units Net tangible assets Percentage of outstanding voting rights Percentage of fair market value Percentage of outstanding of public shares Trust Account Significant Accounting Policies Significant Accounting Policies (Textual) Ordinary shares subject to forfeiture Federal depository insurance coverage SaleOfStockAxis [Axis] Initial Public Offering (Textual) Initial public offering of units Purchase price per unit Exercise price Warrant, Description Upfront underwriting discount Offering price to underwriter Offering price to underwriter, Percentage Additional fee to underwriter Deferred discount gross offering proceeds Percentage of deferred discount gross offering proceeds Total offering costs Underwriter’s commissions Other offering costs Underwriter's fees Aggregate exercise price Option to purchase ordinary shares Warrants to purchase shares and rights Ordinary shares issued upon exercise of the option Cash payment Fair value of purchase option Expected volatility Risk-free interest rate Option expires Private Placements (Textual) Sale of units Sale of price per unit Purchase price Gross proceeds from private placement Purchase of additional units Class B ordinary shares [Member] HK [Member] Related Party Transactions (Textual) Ordinary shares acquired Aggregate purchase price Price per share Ordinary shares issued for services Aggregate issued for services Ordinary shares subject to forfeiture Aggregate ownership interest rate Related party transaction, description Advances from related party Repayments of related party Amount due to related parties Sponsor loans payable Founder shares were forfeited Percentage of maintain company’s issued and outstanding shares Deposit on escrow account Private units subscribed Proceeds from private placement Remaining private placement General and administrative services fees Administrative fees Working capital loans Working capital loans, per unit U.S. Money Market [Member] U.S. Treasury Securities [Member] Amortized Cost Gross Holding Gain Fair Value United States Money Market funds [Member] Cash and Investments Held in Trust Account (Textual) Investment in company’s trust account Cash and cash equivalents held in Trust Account Commitments and Contingencies (Textual) Underwriting agreement, description Percentage of underwriting discount Deferred underwriting discounts and commissions value Description of option to purchase shares Initial public offering shares Warrants to purchase shares Ordinary shares issued upon exercise of option Black-Scholes option-pricing model, description Expected volatility rate Expected life Shareholder's Equity (Textual) Preferred shares, authorized Ordinary shares, authorized Ordinary shares, issued Ordinary share price Warrants price Description of warrant Net income Less: income attributable to ordinary shares subject to possible redemption Adjusted net loss Basic and diluted weighted average shares outstanding Basic and diluted net loss per ordinary share Reconciliation of Earnings per Common Share (Textual) Includes an aggregate of shares held by the initial shareholders are subject to forfeiture. The entire disclosure of initial public offering. The entire disclosure of private placements for the period. description of underwriters agreement. Warrants to purchase shares. Percentage of underwriting discount. Percentage of outstanding voting rights Percentage of maintain company’s issued and outstanding shares Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. Risk-free interest rate assumption used in valuing an instrument. Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Description of warrant. The amount of upfront underwriting discount. The amount of offering price to the underwriter. The percentage of offering price to the underwriter. The amount of additional fee to underwriter. The amount of deferred Discount gross offering proceeds. The percentage of deferred Discount gross offering proceeds The amount of total offering cost. The amount of other offering costs. The amount of underwriter's fees. The amount of aggregate exercise price. The number of option to purchase ordinary shares. The number of warrants to purchase shares and rights. The number of ordinary shares issued upon exercise of the option. The amount of fair value of purchase option. The amount of remaining private placement. The amount of carrying value. The amount of investment in the Company’s Trust Account. Amount of interest earned on investment held in Trust Account. Amount of change in value of ordinary shares subject to possible redemption. DIsclosure of investments held in trust account. The amount of amortized cost. Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS). Cash and investments held in trust account fair value. Working capital loans per unit Assets, Current Assets Liabilities, Current Liabilities Stockholders' Equity Attributable to Parent Liabilities and Equity Common Stock, Par or Stated Value Per Share Operating Income (Loss) Other Nonoperating Income (Expense) Temporary Equity, Accretion to Redemption Value, Adjustment Shares, Outstanding InterestEarnedOnInvestmentHeldInTrustAccount Increase (Decrease) in Prepaid Expense Increase (Decrease) in Accounts Payable and Accrued Liabilities Increase (Decrease) in Due to Related Parties Net Cash Provided by (Used in) Operating Activities Cash and Cash Equivalents, at Carrying Value Significant Accounting Policies [Text Block] InitialPublicOfferingTextBlock PrivatePlacementsTextBlock Related Party Transactions Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Basis of Accounting, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] Fair Value of Financial Instruments, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] DeferredOfferingCostsPolicyTextBlock Shares, Issued Sale of Stock, Consideration Received Per Transaction Other Intangible Assets, Net Cash, FDIC Insured Amount Investment Warrants, Exercise Price Stock Issued During Period, Shares, Acquisitions Stock Issued During Period, Value, Acquisitions Shares Issued, Price Per Share CashAndInvestmentHeldInTrustAccountCarryingValue Net Income (Loss), Including Portion Attributable to Noncontrolling Interest IncomeAttributableToOrdinarySharesSubjectToRedemption WeightedAverageNumberOfSharesOutstandingBasicAndDiluted