Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2019
Summary of Significant Accounting Policies
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated interim financial statements are presented in U.S. dollars in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the rules and regulations of the SEC. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP. In the opinion of management, the unaudited condensed consolidated interim financial statements reflect all adjustments, which include only normal recurring adjustments necessary for the fair statement of the balances and results for the periods presented. Operating results for the three and nine months ended September 30, 2019 are not necessarily indicative of the results that may be expected for the year ended December 31, 2019, or any future period. These unaudited condensed consolidated interim financial statements should be read in conjunction with the audited financial statements contained in the Company’s Annual Report on Form 10-K filed with the SEC on March 29, 2019.
Principles of consolidation	Principles of Consolidation The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, DFB Merger Sub LLC, a Delaware limited liability company, formed on June 17, 2019. All significant intercompany balances and transactions have been eliminated in consolidation.
Emerging Growth Company	Emerging Growth Company Section 102(b)(1) of the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”) exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that an emerging growth company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such an election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period, which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s financial statements with another public company that is neither an emerging growth company nor an emerging growth company that has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash accounts in a financial institution, which, at times, may exceed the Federal Depository Insurance Coverage of $250,000. At September 30, 2019 and December 31, 2018, the Company has not experienced losses on these accounts and management believes the Company is not exposed to significant risks on such accounts.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all short-term investments with an original maturity of three months or less when purchased to be cash equivalents. The Company had approximately $233,000 and $0 in cash equivalents as of September 30, 2019 and December 31, 2018, respectively.
Financial Instruments	Financial Instruments The fair value of the Company’s assets and liabilities, which qualify as financial instruments under the FASB ASC 820, “Fair Value Measurements and Disclosures,” approximates the carrying amounts represented on the condensed consolidated balance sheets.
Use of Estimates	Use of Estimates The preparation of the financial statements in conformity with U.S. GAAP requires the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses during the reporting periods. Actual results could differ from those estimates.
Offering Costs	Offering Costs Offering costs, which consist of legal, accounting, underwriting fees and other costs that were directly related to the Initial Public Offering, totaled approximately $13.06 million, inclusive of $7.875 million in deferred underwriting commissions. Offering costs were charged to stockholders’ equity upon the completion of the Initial Public Offering.
Common Stock Subject to Possible Redemption	Common Stock Subject to Possible Redemption The Company accounts for its common stock subject to possible redemption in accordance with the guidance in ASC Topic 480 “Distinguishing Liabilities from Equity.” Shares of common stock subject to mandatory redemption (if any) are classified as liability instruments and are measured at fair value. Conditionally redeemable shares of common stock (including shares of common stock that feature redemption rights that are either within the control of the holder or subject to redemption upon the occurrence of uncertain events not solely within the Company’s control) are classified as temporary equity. At all other times, shares of common stock are classified as stockholders’ equity. The Company’s common stock features certain redemption rights that are considered to be outside of the Company’s control and subject to the occurrence of uncertain future events. Accordingly, at September 30, 2019 and December 31, 2018, 24,055,352 and 24,054,988, respectively, shares of common stock subject to possible redemption at the redemption amount are presented as temporary equity, outside of the stockholders’ equity section of the Company’s condensed consolidated balance sheets.
Net Income (Loss) per Share	Net Income (Loss) per Share Net income (loss) per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the periods. The Company has not considered the effect of the warrants sold in the Initial Public Offering and the Private Placement to purchase an aggregate of 12,666,666 shares of the Company’s common stock in the calculation of diluted income per share, since their inclusion would be anti-dilutive under the treasury stock method. The Company’s unaudited condensed consolidated interim statements of operations include a presentation of income per share for common stock subject to redemption in a manner similar to the two-class method of income per share. Net income per common share, basic and diluted for Public Shares is calculated by dividing the interest income earned on the Trust Account, net of applicable taxes and funds available to be withdrawn from the Trust Account for working capital purposes (subject to an annual limit of $250,000), resulting in a total of approximately $1.0 million and $3.3 million for the three and nine months ended September 30, 2019, respectively, by the weighted average number of Public Shares outstanding for the periods. Net loss per common share, basic and diluted for Founder Shares is calculated by dividing the net income, less income attributable to Public Shares by the weighted average number of Founder Shares outstanding for the periods.
Income Taxes	Income Taxes The Company follows the asset and liability method of accounting for income taxes under FASB ASC 740, “Income Taxes.” Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that included the enactment date. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized. As of September 30, 2019 and December 31, 2018, the Company has a deferred tax asset of approximately $904,000 and $217,000 respectively, which has a full valuation allowance recorded against it. The Company’s current taxable income primarily consists of interest income on the Trust Account. The Company’s general and administrative costs are generally considered start-up costs and are not currently deductible. During the three and nine months ended September 30, 2019 and 2018, the Company recorded income tax expense of approximately $277,000 and $874,000 in 2019, and approximately $242,000 and $546,000 in 2018, respectively, primarily related to interest income earned on the Trust Account. The Company’s effective tax rate for the nine months ended September 30, 2019 and 2018 was approximately 98.0% and 27.7%, respectively, which differs from the expected income tax rate due to the start-up costs (discussed above) which are not currently deductible. FASB ASC 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more likely than not to be sustained upon examination by taxing authorities. There were no unrecognized tax benefits as of September 30, 2019 and December 31, 2018. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. The Company is currently not aware of any issues under review that could result in significant payments, accruals or material deviation from its position. The Company is subject to income tax examinations by major taxing authorities since inception.
Recent Accounting Pronouncements	Recent Accounting Pronouncements The Company’s management does not believe that there are any recently issued, but not yet effective, accounting pronouncements, that, if currently adopted, would have a material effect on the Company’s unaudited condensed consolidated interim financial statements.