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Balance Sheet Details (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Inventory, Finished Goods and Work in Process, Net of Reserves
Work-in-process	$ 1,214	$ 651
Finished goods	50	230
Inventory, Net	1,264	881
Intangible assets
Gross Carrying Amount	10,020	10,020
Accumulated Amortization	9,658	9,365
Net Carrying Value	362	655
Estimated aggregate amortization expense to be recognized in future
Remainder of 2015	100
2016 through 2018	100
Developed technology
Intangible assets
Gross Carrying Amount	9,240	9,240
Accumulated Amortization	$ 9,240	9,031
Net Carrying Value		$ 209
Developed technology | Minimum
Intangible assets
Life	3 years	3 years
Developed technology | Maximum
Intangible assets
Life	5 years	5 years
Patent license
Intangible assets
Life	7 years	7 years
Gross Carrying Amount	$ 780	$ 780
Accumulated Amortization	418	334
Net Carrying Value	$ 362	$ 446

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