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Consolidated Balance Sheet Detail - Schedule of Inventories/Prepaid/PP&E (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Inventories:
Work-in-process	$ 746	$ 548
Finished goods	222	600
Total	968	1,148
Prepaid expenses and other:
Prepaid IC material and production costs	174	620
Prepaid insurance	122	128
Prepaid software	24	28
Refundable tax	61	86
Other	91	61
Total	472	923
Property and equipment, net:
Property and equipment, gross	4,362	4,609
Less: Accumulated depreciation and amortization	(4,165)	(4,330)
Property and equipment, net	197	279
Equipment, furniture and fixtures and leasehold improvements
Property and equipment, net:
Property and equipment, gross	4,239	4,486
Acquired software
Property and equipment, net:
Property and equipment, gross	$ 123	$ 123

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