Consolidated Balance Sheet Detail (Tables)

12 Months Ended

Dec. 31, 2019

Consolidated Balance Sheets And Statements Of Operations Components Disclosure [Abstract]

Schedule of Inventories/Prepaid/PP&E

	December 31,
	2019			2018
	(in thousands)
Inventories:
Work-in-process	$	746		$	548
Finished goods		222			600
	$	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
	$	472		$	923
Property and equipment, net:
Equipment, furniture and fixtures and leasehold    improvements	$	4,239		$	4,486
Acquired software		123			123
		4,362			4,609
Less: Accumulated depreciation and amortization		(4,165	)		(4,330	)
	$	197		$	279

Schedule of accrued expenses and other

	December 31,
	2019		2018
	(in thousands)
Accrued wages and employee benefits	$	296	$	327
Customer advance		—		300
Professional fees, legal and consulting		229		178
IC development and wafer purchases		104		90
Warranty accrual		63		73
Interest payable		84		51
Corporate taxes		20		21
Other		359		362
	$	1,155	$	1,402