Net Income (Loss) per Common Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Calculations for Basic and Diluted Net Income (Loss) Per Common Share

The calculations for basic and diluted net income (loss) per common share are as follows:

	Year Ended December 31,
	2022			2021			2020
Basic net income (loss) per common share:
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	)
Diluted net income (loss) per common share:
Numerator:
Net income (loss) available to common stockholders	$	(1,598	)	$	472		$	(6,199	)
Plus: accretion of Series B convertible preferred stock dividends, if dilutive		—			—			—
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
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	)

Common Stock Equivalents Excluded From Diluted Net Income (Loss) Per Share

The following common stock equivalents have been excluded from diluted net income (loss) per share for the fiscal years presented below because their inclusion would have been anti-dilutive (in thousands):

	December 31,
	2022		2021		2020
Shares of common stock subject to outstanding RSUs		819		—		683
Shares of common stock subject to outstanding stock options		506		—		551
Shares of common stock subject to outstanding warrants		275		—		315
Shares of common stock issuable upon conversion of Series B    convertible preferred stock		6,331		6,029		5,742
Total		7,931		6,029		7,291