Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Aug. 05, 2019	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Class Of Stock [Line Items]
Common stock, capital shares reserved for future issuance		12,846,195
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
Preferred stock dividends issued		1,220
Dividends in arrears		$ 16
Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred Stock, shares authorized		50,000,000