Calculations for Basic and Diluted Net Income (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income (loss)	$ (392)	$ 1,620	$ (5,105)
Less: accretion of Series B convertible preferred stock dividends	(1,206)	(1,148)	(1,094)
Net income (loss) available to common stockholders	$ (1,598)	$ 472	$ (6,199)
Denominator:
Weighted average common shares outstanding - basic	22,659	21,340	17,978
Net income (loss) per common share - basic	$ (0.07)	$ 0.02	$ (0.34)
Dilutive securities:
Stock options, RSUs, and warrants		927
Weighted average common shares outstanding - diluted	22,659	22,267	17,978
Net income (loss) per common share - diluted	$ (0.07)	$ 0.02	$ (0.34)
Diluted net income (loss) per common share:
Net income (loss) available to common stockholders	$ (1,598)	$ 472	$ (6,199)
Net income (loss) available to common stockholders	$ (1,598)	$ 472	$ (6,199)