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Details of Certain Financial Statement Components (Tables)

9 Months Ended

Sep. 30, 2022

Details of Certain Financial Statement Components

Schedule of inventories

​

​	​	​	​	​	​	​
​	​	September 30,		​	December 31,
​		2022			2021
Inventories		(in thousands)
Raw materials		$	655		$	447
Work-in-process	​	​	230	​	​	209
Finished goods	​	​	172	​	​	159
Total inventories		$	1,057		$	814

Schedule of property, plant and equipment, net

​

​	​	​	​	​	​	​
​	​	September 30,		​	December 31,
​		2022			2021
Property, plant and equipment, net	​	(in thousands)
Furniture, machinery and equipment	​	$	1,643	​	$	1,696
Leasehold improvements	​		409	​		444
​	​		2,052	​		2,140
Less: accumulated depreciation	​		(1,856)	​		(1,802)
Total property, plant and equipment, net	​	$	196	​	$	338

Schedule of intangible assets, net

​

​	​	​	​	​	​	​
​	​	September 30,		​	December 31,
​		2022			2021
Intangible assets, net	​	(in thousands)
Patents and trademarks	​	$	658	​	$	658
Less: accumulated amortization	​		(569)	​		(527)
Total intangible assets, net	​	$	89	​	$	131

Schedule of future amortization on existing intangibles

​

​	​	​	​
Years ending December 31,		(in thousands)
2022 (remainder of year)	​	$	13
2023	​		42
2024	​		27
2025	​		7
​	​	$	89

Schedule of accrued liabilities

​

​	​	​	​	​	​	​
​	​	September 30,		​	December 31,
​		2022			2021
Accrued liabilities	​	(in thousands)
Accrued compensation and benefits	​	$	219	​	$	402
Accrued vacation	​		94	​		82
Other accrued liabilities	​		21	​		23
Total accrued liabilities	​	$	334	​	$	507

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