Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Mar. 05, 2020	Feb. 11, 2020	Feb. 10, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Common stock, par value				$ 0.001	$ 0.001
Common Stock [Member]
Subsequent Event [Line Items]
Issuance of Common Stock, conversion of Preferred Stock to Common Stock				$ 1
Issuance of stock, shares				1,406,123
Subsequent Event [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Issuance of stock, shares	1,046,249
Subsequent Event [Member] | Series C Preferred Stock [Member]
Subsequent Event [Line Items]
Issuance of Common Stock, conversion of Preferred Stock to Common Stock	$ 30,000	$ 30,000
Right to purchase common stock shares			0.152
Common stock, par value		$ 9.00
Percentage of shares owned by share holders		9.99%
Share price		$ 9,000
Number of shares issuable upon conversion		1,000
Right to purchase preferred stock shares		0.001
Issuance of stock, shares	2,287