Significant Accounting Policies - reconciliation of net loss per share (Detail) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2019
Net income		$ 596,047	$ 456,797	$ 1,052,844
Less: Income attributable to common stock subject to possible redemption		(1,004,331)		(1,604,574)
Adjusted Net Loss		$ (408,284)		$ (551,730)
Weighted average shares outstanding, basic and diluted | shares	[1]	6,939,008		6,559,587
Basic and diluted net loss per common share | $ / shares	[2]	$ (0.06)		$ (0.08)

[1] Excludes an aggregate of 21,770,239 shares subject to possible redemption.

[2] Net loss per share – basic and diluted excludes interest income attributable to shares subject to possible redemption of $1,004,331 and $1,604,574 for the three and six months ended June 30, 2019 (see Note 2).