CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash	$ 14,581	$ 30,343
Accounts receivable (net of allowance for doubtful accounts of $68 and $40, respectively)	10,919	8,191
Inventory	1,379	1,920
Other current assets	464	1,036
Total current assets	27,343	41,490
Property and equipment, net	4,049	2,892
Intangible assets	2,917	3,197
Total assets	34,309	47,579
Current liabilities:
Accounts payable	7,588	5,824
Accrued expenses	3,603	4,714
Warrant liabilities	757	1,081
Other	160	210
Total current liabilities	12,108	11,829
Long term debt	71	109
Total liabilities	$ 12,179	$ 11,938
COMMITMENTS AND CONTINGENCIES
Shareholders’ equity:
Common stock, no par value; shares authorized — 75,000; shares issued and outstanding — 23,789 and 23,786, respectively	$ 307,766	$ 305,008
Treasury stock — 1,250 shares	(3,150)	0
Other comprehensive loss	0	(71)
Accumulated deficit	(324,025)	(307,685)
Total shareholders’ equity	22,130	35,641
Total liabilities and shareholders’ equity	34,309	47,579
Series A
Shareholders’ equity:
Series B-2 voting convertible preferred stock, no par value: shares authorized and reserved — 39, shares issued and outstanding — 12	3,150	0
Series B-2
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