Earnings Per Share - Details of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net loss	$ (6,887)	$ (7,002)
Denominator:
Weighted average shares outstanding – basic (in shares)	61,646	54,501
Potential common shares - options / warrants (treasury stock method) and convertible notes (in shares)	0	0
Weighted average shares outstanding – diluted (in shares)	61,646	54,501
Shares excluded (anti-dilutive) (in shares)	8,032	1,024
Net loss per common share:
Basic (in dollars per share)	$ (0.11)	$ (0.13)
Diluted (in dollars per share)	$ (0.11)	$ (0.13)