CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash	$ 25,903	$ 30,343
Accounts receivable (net of allowance for doubtful accounts of $86 and $40, respectively)	9,166	8,191
Inventory	2,005	1,920
Other current assets	845	1,036
Total current assets	37,919	41,490
Property and equipment, net	3,446	2,892
Intangible assets	3,127	3,197
Total assets	44,492	47,579
Current liabilities:
Accounts payable	6,726	5,824
Accounts Payable and Accrued Liabilities, Current	4,320	4,714
Warrant liabilities	1,398	1,081
Other	180	210
Total current liabilities	12,624	11,829
Long term debt	100	109
Other long-term liabilities	66	0
Total liabilities	12,790	11,938
COMMITMENTS AND CONTINGENCIES (Note 13)
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 — 23,786	305,931	305,008
Other comprehensive loss	(71)	(71)
Accumulated deficit	(312,547)	(307,685)
Total shareholders’ equity	31,702	35,641
Total liabilities and shareholders’ equity	$ 44,492	$ 47,579