Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Accounts receivable for continuing operations and discontinued operations

	Year Ended
	December 31,
	2021			2020
Continuing Operations:
Trade receivables	$	732		$	281
Allowance for doubtful accounts		(7	)		(3	)
Discontinued Operations:
Trade receivables		6			108
Allowance for doubtful accounts		(12	)		-
Balance of accounts receivable, net	$	719		$	386

Schedule of inventories

	As of
	December 31,
	2021		2020
	(in thousands)
Raw materials	$	468	$	468
Work-in-process		328		614
Finished goods		330		459
	$	1,126	$	1,541

Schedule of property and equipment

	As of
	December 31,
	2021			2020
	(in thousands)
Machinery, equipment and tooling	$	3,296		$	3,343
Buildings		1,711			1,711
Information systems		819			835
Land and land improvements		594			594
Furniture and fixtures		7			8
Total cost		6,427			6,491
Accumulated depreciation and amortization		(4,126	)		(4,009	)
Property and equipment, net	$	2,301		$	2,482

Schedule of estimated useful lives

Asset description	Life
Buildings	39 years
Machinery, equipment and tooling	3-10 years
Furniture and fixtures	7 years
Information systems	3 years

Schedule of product warranty liability

	Year Ended
	December 31,
	2021			2020
	(in thousands)
Balance, beginning of period	$	1		$	3
Charged to cost of sales		(9	)		(20	)
Actual product warranty expenditures		9			18
Balance, end of period	$	1		$	1