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Summary of Significant Accounting Policies (Details) - USD ($)		3 Months Ended		9 Months Ended
	Feb. 21, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Significant Accounting Policies
Annual ceiling limit				$ 250,000
Cash equivalents		$ 233,000		$ 233,000		$ 0
Deferred underwriting commissions charged to equity in connection with the initial public offering					$ 7,875,000
Temporary stock, shares outstanding (in shares)		24,055,352		24,055,352		24,054,988
Number of warrants excluded in the calculation of diluted income per share				12,666,666
Estimated total annual ceiling limit		$ 1,000,000		$ 3,300,000
Deferred tax asset		904,000		904,000		$ 217,000
Income Tax Expense (Benefit)		276,661	$ 241,760	$ 874,355	$ 546,213
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				98.00%	27.70%
Unrecognized tax benefits		$ 0		$ 0		$ 0
IPO
Significant Accounting Policies
Offering costs	$ 13,060,000
Deferred underwriting commissions charged to equity in connection with the initial public offering	$ 7,875,000

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