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DETAILS OF CERTAIN FINANCIAL STATEMENT COMPONENTS (Tables)

3 Months Ended

Mar. 31, 2021

DETAILS OF CERTAIN FINANCIAL STATEMENT COMPONENTS

Schedule of inventories

		March 31,			December 31,
		2021			2020
Inventories		(in thousands)
Raw materials		$	555		$	520
Work-in-process			229			246
Finished goods			97			100
Total inventories		$	881		$	866

Schedule of property, plant and equipment, net

		March 31,			December 31,
		2021			2020
Property, plant and equipment, net		(in thousands)
Furniture, machinery and equipment		$	1,661		$	1,662
Leasehold improvements			544			538
			2,205			2,200
Less: accumulated depreciation			(1,841)			(1,793)
Total property, plant and equipment, net		$	364		$	407

Schedule of intangible assets, net

		March 31,			December 31,
		2021			2020
Intangible assets, net		(in thousands)
Patents and trademarks		$	658		$	658
Less: accumulated amortization			(479)			(463)
Total intangible assets, net		$	179		$	195

Schedule of future amortization on existing intangibles

Years ending December 31,		(in thousands)
2021 (remainder of year)		$	49
2022			54
2023			42
2024			27
2025			7
Thereafter			—
		$	179

Schedule of accrued liabilities

		March 31,			December 31,
		2021			2020
Accrued liabilities		(in thousands)
Accrued warranty		$	7		$	7
Accrued wages and benefits			138			180
Accrued vacation			103			110
Accrued other			47			46
Total accrued liabilities		$	295		$	343

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