Fair Value - Additional Information (Detail)		3 Months Ended
	Dec. 11, 2019 $ / shares	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 10, 2020 $ / shares	Feb. 24, 2020 shares	Dec. 31, 2019 USD ($)	Apr. 28, 2017 $ / shares shares
Fair Value Measurements Disclosure [Line Items]
Transfers of assets between Level 1, Level 2, and Level 3 of the fair value hierarchy | $		$ 0				$ 0
Transfers of liabilities between Level 1, Level 2, and Level 3 of the fair value hierarchy | $		0				$ 0
Increase in fair value of contingent consideration | $		1,056,000	$ 998,000
Warrants to purchase common shares (in units) | shares							24,900,000
Warrants, exercise price (in dollars per share)				$ 0.68
Offering price (in dollars per share)				$ 0.68			$ 1.00
Reverse split, conversion ratio	0.0769
Increase in fair value of warrant liabilities | $		$ 155,000	$ 106,000
Series A Warrant
Fair Value Measurements Disclosure [Line Items]
Warrants, exercise price (in dollars per share)							13.00
Series B Warrant
Fair Value Measurements Disclosure [Line Items]
Warrants, exercise price (in dollars per share)							$ 13.00
Common Stock
Fair Value Measurements Disclosure [Line Items]
Number of common stock or warrants in each unit (in shares) | shares							0.077
Common Stock | Series B Warrant
Fair Value Measurements Disclosure [Line Items]
Number of common stock or warrants in each unit (in shares) | shares							0.058
Exchange Agreement | Series B Warrant
Fair Value Measurements Disclosure [Line Items]
Number of common stock or warrants in each unit (in shares) | shares					0.61
Warrants, exercise price (in dollars per share)	$ 0.37