Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended
	Aug. 05, 2019	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Class Of Stock [Line Items]
Common stock, capital shares reserved for future issuance		12,741,338	12,741,338
Stock repurchase program, authorized amount	$ 25,000
Stock repurchase program expiration date	Aug. 05, 2020
Stock repurchased during period, shares				836,904
Shares repurchase price per share				$ 2.98
Stock repurchase program, remaining authorized repurchase amount				$ 13,112
Series A Convertible Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred Stock, shares authorized		1,000,000	1,000,000		1,000,000
Preferred stock dividends issued		1,686	2,906
Dividends in arrears		$ 4
Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred Stock, shares authorized		50,000,000	50,000,000