Condensed Consolidated Balance Sheets (unaudited) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 5,415,000	$ 5,495,000
Accounts receivable	137,000	156,000
Restricted cash	35,000	35,000
Inventory	703,000	551,000
Prepaid expenses and other current assets	217,000	167,000
Total current assets	6,507,000	6,404,000
Long-term assets
Property and equipment, net	116,000	86,000
Goodwill	718,000	718,000
Other intangible assets, net	842,000	917,000
Other assets	126,000	76,000
Total assets	8,309,000	8,201,000
Current liabilities
Accounts payable	862,000	695,000
Accrued compensation and other current liabilities	915,000	1,634,000
Total current liabilities	1,777,000	3,194,000
Long-term liabilities
Other long-term liabilities	196,000	109,000
Commitments and contingencies (Note 6)
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 September 30, 2016 and December 31, 2015, respectively	15,000	14,000
Additional paid-in-capital	101,395,000	89,456,000
Accumulated deficit	(95,698,000)	(86,247,000)
Total stockholders’ equity	5,712,000	3,223,000
Total liabilities and stockholders’ equity	8,309,000	8,201,000
Series A Warrant Liability [Member]
Long-term liabilities
Warrant liability	509,000	1,213,000
Series B Warrant Liability [Member]
Current liabilities
Series B warrant liability	0	865,000
Series C Warrant Liability [Member]
Long-term liabilities
Warrant liability	115,000	462,000
Series A Convertible Preferred Stock [Member]
Stockholders’ equity
Series A convertible preferred stock, 10,000 shares designated; zero and 4,555 issued and outstanding at September 30, 2016 and December 31, 2015, respectively	0	0
Series B Convertible Preferred Stock [Member]
Stockholders’ equity
Series A convertible preferred stock, 10,000 shares designated; zero and 4,555 issued and outstanding at September 30, 2016 and December 31, 2015, respectively	$ 0	$ 0