Stockholder's Equity - Schedule of Transaction Related to Warrants to Purchase Common Stock (Detail) - $ / shares	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Stockholders Equity [Abstract]
Warrants outstanding beginning balance, Shares	323,894
Warrants outstanding ending balance, Shares	323,894	323,894
Warrants exercisable, Shares	323,894
Warrants outstanding beginning balance, Weighted average exercise price	$ 4.32
Warrants outstanding ending balance,Weighted average exercise price	4.32	$ 4.32
Warrants exercisable, Weighted average exercise price	$ 4.32
Warrants outstanding, Weighted average remaining contractual life	3 years 2 months 26 days	3 years 8 months 26 days
Warrants exercisable, Weighted average remaining contractual life	3 years 2 months 26 days