Equity Transactions - Underwritten Public Offering - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Oct. 01, 2020	Sep. 15, 2020	Mar. 05, 2020	Dec. 31, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Net proceeds from issuance of common stock				$ 7,831	$ 13,166
Series D Convertible Preferred Stock [Member]
Class Of Stock [Line Items]
Issuance of stock, shares				3,215,000
Common Stock [Member]
Class Of Stock [Line Items]
Issuance of stock, shares			1,046,249	475,469	8,025,119
Underwritten Public Offering Member
Class Of Stock [Line Items]
Underwritten offering, exercisable term		30 days
Gross proceeds from issuance of common and preferred stock		$ 80,000
Net proceeds from issuance of common and preferred stock		$ 74,700
Underwritten Public Offering Member | Series D Convertible Preferred Stock [Member]
Class Of Stock [Line Items]
Issuance of stock, shares		3,215,000
Share price		$ 10.00
Underwritten Public Offering Member | Common Stock [Member]
Class Of Stock [Line Items]
Issuance of stock, shares	1,200,000	4,785,000
Share price	$ 10.00	$ 10.00
Net proceeds from issuance of common stock	$ 11,200
Underwritten Public Offering Member | Maximum [Member]
Class Of Stock [Line Items]
Additional number of common stock issuable		1,200,000