Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 2,502	$ 5,495
Accounts receivable	288	156
Restricted cash	35	35
Inventory	774	551
Prepaid expenses and other current assets	157	167
Total current assets	3,756	6,404
Long-term assets
Property and equipment, net	118	86
Goodwill	718	718
Other intangible assets, net	867	917
Other assets	76	76
Total assets	5,535	8,201
Current liabilities
Accounts payable	957	695
Accrued compensation and other current liabilities	944	1,634
Total current liabilities	1,901	3,194
Long-term liabilities
Other long-term liabilities	200	109
Commitments and contingencies (Note 6)	0	0
Stockholders’ equity
Common stock, $0.001 par value, 100,000,000 shares authorized, 15,761,530 and 14,017,909 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively.	15	14
Additional paid-in-capital	95,543	89,456
Accumulated deficit	(92,948)	(86,247)
Total stockholders’ equity	2,610	3,223
Total liabilities and stockholders’ equity	5,535	8,201
Series A Warrant Liability [Member]
Long-term liabilities
Warrant liability		1,213
Series B Warrant Liability [Member]
Current liabilities
Series B warrant liability	0	865
Series C Warrant Liability [Member]
Long-term liabilities
Warrant liability		462
Series A Convertible Preferred Stock [Member]
Stockholders’ equity
Series A convertible preferred stock, $0.001 par value, 40,000 shares authorized, 7,780 and 4,555 issued and outstanding at June 30, 2016 and December 31, 2015, respectively.	$ 0	$ 0