CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash	$ 20,218	$ 30,343
Accounts receivable (net of allowance for doubtful accounts of $91 and $40, respectively)	8,980	8,191
Inventory	2,078	1,920
Other current assets	2,270	1,036
Total current assets	33,546	41,490
Property and equipment, net	4,616	2,892
Intangible assets	3,057	3,197
Total assets	41,219	47,579
Current liabilities:
Accounts payable	6,120	5,824
Accrued expenses	3,258	4,714
Warrant liabilities	1,286	1,081
Other	154	210
Total current liabilities	10,818	11,829
Long term debt	91	109
Other long-term liabilities	66	0
Total liabilities	$ 10,975	$ 11,938
COMMITMENTS AND CONTINGENCIES (Note 14)
Shareholders' equity:
Series B-2 voting convertible preferred stock, no par value: shares authorized and reserved — 39, shares issued and outstanding — 12	$ 38,389	$ 38,389
Common stock, no par value; shares authorized — 75,000; shares issued and outstanding — 23,787	306,625	305,008
Other comprehensive loss	(71)	(71)
Accumulated deficit	(314,699)	(307,685)
Total shareholders’ equity	30,244	35,641
Total liabilities and shareholders’ equity	$ 41,219	$ 47,579