Equity Transactions - Rights Offering - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Feb. 28, 2021
Class Of Stock [Line Items]
Issuance of Common Stock, conversion of Preferred Stock to Common Stock	$ 1	$ 1
Common stock, par value	$ 0.001	$ 0.001		$ 0.001
Aggregate issue costs		$ 0	$ 146
Common Stock [Member]
Class Of Stock [Line Items]
Issuance of Common Stock, conversion of Preferred Stock to Common Stock	$ 2	$ 2
Issuance of stock, shares	393,414	737,619	257,185
Aggregate issue costs			$ 130
Series C Preferred Stock [Member]
Class Of Stock [Line Items]
Number of shares issuable upon conversion					73,000