Calculations for Basic Net Income (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income (loss)	$ 519	$ 2,540	$ (731)	$ 3,541
Less: accretion of Series B convertible preferred stock dividends	(304)	(289)	(902)	(859)
Net income (loss) available to common stockholders	$ 215	$ 2,251	$ (1,633)	$ 2,682
Denominator:
Weighted average common shares outstanding - basic	22,682	22,448	22,632	20,948
Net income (loss) per common share - basic	$ 0.01	$ 0.10	$ (0.07)	$ 0.13
Dilutive securities:
Stock options, RSUs, and warrants	633	925		913
Convertible preferred shares		5,957
Weighted average common shares outstanding - diluted	23,315	29,330	22,632	21,861
Net income (loss) per common share - diluted	$ 0.01	$ 0.09	$ (0.07)	$ 0.12
Diluted net income (loss) per common share:
Net income (loss) available to common stockholders	$ 215	$ 2,251	$ (1,633)	$ 2,682
Plus: accretion of Series B convertible preferred stock dividends, if dilutive		289
Net income (loss) available to common stockholders	$ 215	$ 2,540	$ (1,633)	$ 2,682