Earnings Per Share - Details of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net loss	$ (5,665)	$ (8,493)	$ (12,551)	$ (15,496)
Denominator:
Weighted average shares outstanding – basic (in shares)	62,453	55,183	59,726	55,844
Potential common shares - options / warrants (treasury stock method) and convertible notes (as if converted method) (in shares)	0	0	0	0
Weighted average shares outstanding – diluted (in shares)	62,453	55,183	59,726	55,844
Shares excluded (anti-dilutive) (in shares)	9,021	639	9,469	869
Net loss per common share:
Basic (in dollars per share)	$ (0.09)	$ (0.15)	$ (0.21)	$ (0.28)
Diluted (in dollars per share)	$ (0.09)	$ (0.15)	$ (0.21)	$ (0.28)