Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 10,539	$ 2,726
Accounts receivable	110	133
Restricted cash	35	35
Inventory	855	660
Prepaid expenses and other current assets	261	247
Total current assets	11,800	3,801
Long-term assets
Property and equipment, net	93	103
Goodwill	718	718
Other intangible assets, net	21,128	817
Other assets	126	126
Total assets	33,865	5,565
Current liabilities
Accounts payable	935	538
Accrued compensation and other current liabilities	1,237	1,169
Total current liabilities	2,172	1,707
Long-term liabilities
Other long-term liabilities	1,201	143
Total liabilities	3,721	2,130
Commitments and contingencies (Note 6)
Stockholders’ equity
Common stock, $0.001 par value, 100,000,000 shares authorized, 47,479,879 and 16,786,952 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively.	47	17
Additional paid-in-capital	131,296	101,730
Accumulated deficit	(101,199)	(98,312)
Total stockholders’ equity	30,144	3,435
Total liabilities and stockholders’ equity	33,865	5,565
Series A Warrant Liability [Member]
Long-term liabilities
Warrant liability	291	194
Series C Warrant Liability [Member]
Long-term liabilities
Warrant liability	57	86
Series B Convertible Preferred Stock [Member]
Stockholders’ equity
Preferred Stock, $.001 par value 10,000,000 shares authorized: Series B convertible preferred stock, 13,780 are designated at March 31, 2017 and December 31, 2016; 12,179 and 12,780 shares issued and outstanding at March 31, 2017 and at December 31, 2016, respectively. Liquidation value of zero.	$ 0	$ 0