Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of fair value of employee stock options estimated using the weighted-average assumptions

	Years ended December 31,
	2019			2018
Fair value of the company's common stock on date of grant	$	1.10		$	0.95
Expected term		6.5 years			6.5 years
Risk free interest rate		2.38	%		2.92	%
Dividend yield		0.00	%		0.00	%
Volatility		79.0	%		79.0	%
Fair value of options granted	$	0.77		$	0.68

Schedule of total stock-based compensation costs recognized

	Years ended December 31,
	2019		2018
Cost of goods sold	$	47	$	38
Selling expenses		101		74
General and administrative		280		263
Research and development		191		118
Total	$	619	$	493

Schedule of stock-based awards outstanding

Plan	Stock Options		Restricted Stock		Total
2016 Employee Plan		1,666		-		1,666
2016 Director Plan		279		-		279
Other		500				500
2005 Employee Plan		1,174		-		1,174
2005 Director Plan		352		-		352
		3,971		-		3,971
Stock-based awards available for grant as of December 31, 2019						913

Schedule of stock options award activity

	Number of shares			Weighted-Average Exercise Price		Weighted-Average Contractual Term		Aggregate Intrinsic Value
Outstanding at January 1, 2019		3,656		$	0.88
Options granted		438			1.09
Options exercised		(12	)		0.55
Options forfeited		(67	)		0.86
Options expired		(44	)		0.96
Outstanding at December 31, 2019		3,971		$	0.91		6.7	$	221
Exercisable at    December 31, 2019		2,293		$	0.94		5.5	$	115

Schedule of restricted stock award activity

	Number of shares			Weighted-Average Grant Date Fair Value per Share
Unvested restricted stock awards outstanding at January1, 2019		136		$	0.71
Restricted stock awards granted		-			-
Restricted stock awards vested		(134	)		0.71
Restricted stock awards forfeited		(2	)		0.62
Unvested restricted stock awards outstanding at December 31, 2019		-			-