CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net revenue
Product	$ 1,111	$ 1,287	$ 2,066	$ 2,407
Royalty and other	273	346	530	677
Total net revenue	1,384	1,633	2,596	3,084
Cost of net revenue	732	963	1,334	1,826
Gross profit	652	670	1,262	1,258
Operating expenses
Research and development	2,313	4,884	5,798	10,116
Selling, general and administrative	1,101	1,577	2,415	3,093
Impairment of goodwill			0
Restructuring charges	1,002		1,002	676
Total operating expenses	4,416	6,461	9,215	13,885
Loss from operations	(3,764)	(5,791)	(7,953)	(12,627)
Interest expense	223	213	447	247
Other income, net		20	13	45
Loss before income taxes	(3,987)	(5,984)	(8,387)	(12,829)
Income tax provision	7	20	12	40
Net loss	(3,994)	(6,004)	(8,399)	(12,869)
Other comprehensive income, net of tax:
Net unrealized gains on available-for-sale securities				16
Comprehensive loss	$ (3,994)	$ (6,004)	$ (8,399)	$ (12,853)
Net loss per share
Basic and diluted	$ (0.60)	$ (0.91)	$ (1.26)	$ (1.96)
Shares used in computing net loss per share
Basic and diluted	6,677	6,598	6,662	6,583

Represents the amount of revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property and revenues from the sale of other goods or rendering of other services, not elsewhere specified in the taxonomy; net of (reduced by) sales adjustments, returns, allowances, and discounts.

No definition available.