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Consolidated Balance Sheet Detail - Schedule of Inventories/Prepaid/PP&E (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Inventories:
Work-in-process	$ 548	$ 1,612
Finished goods	600	154
Total	1,148	1,766
Prepaid expenses and other:
Prepaid IC material and production costs	620	1,107
Prepaid insurance	128	115
Prepaid software	28	38
Refundable tax	86	4
Other	61	83
Total	923	1,347
Property and equipment, net:
Property and equipment, gross	4,609	4,774
Less: Accumulated depreciation and amortization	(4,330)	(3,947)
Property and equipment, net	279	827
Equipment, furniture and fixtures and leasehold improvements
Property and equipment, net:
Property and equipment, gross	4,486	4,478
Acquired software
Property and equipment, net:
Property and equipment, gross	$ 123	$ 296

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