Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of stock-based compensation expense

	Three months ended  June 30,					Six months ended  June 30,
	2016			2015		2016		2015
Product research and development	$	(3	)	$	99	$	40	$	322
Sales and marketing		51			66		113		172
General and administrative		8			9		17		278
Total stock-based compensation expense	$	56		$	174	$	170	$	772

	Remaining unrecognized expense at June 30, 2016
Stock-based compensation	$	173

Summary of all warrant activity

	June 30, 2016
	Warrants			Weighted Average Exercise Price		Weighted Average  Remaining Contractual Life
Outstanding and exercisable, January 1, 2016		464,073		$	3.02		0.19
Granted		-			-		-
Expired/cancelled		(384,073	)		3.13		-
Exercised		(80,000	)		2.00		-
Outstanding and exercisable, June 30, 2016		-		$	-		-

Stock options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of all stock option plans / warrant activity

	Number of Options Outstanding			Weighted Average Exercise Price
Outstanding at January 1, 2016		2,184,117		$	4.48
Granted		-			-
Forfeited		(297,147	)		4.70
Outstanding at June 30, 2016		1,886,970		$	4.45