Business Segments - Summary of company's operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Business Segments
Revenues from unaffiliated customers	$ 43,821	$ 40,558
Cost of goods sold, inclusive of dep. and amort.	(37,877)	(34,570)
Gross profit	5,944	5,988
Operating expenses:
Selling, general and administrative	(8,427)	(9,423)
Legal settlement awards		(1,890)
Operating (loss)	(2,483)	(5,325)
Other (expense)/income:
Other income: Paycheck Protection Program loan forgiveness		4,000
Interest expense	(240)	(187)
Gain on sale of equipment	36	(98)
Total other (expense)/income	(204)	9,337
(Loss)/income before income tax provision	(2,687)	4,012
Income tax benefit/ (provision)	(570)	(43)
Net (loss)/income	(2,117)	4,055
Total Assets	45,294	50,093
Operating Segments
Business Segments
Revenues from unaffiliated customers	43,821	40,558
Cost of goods sold, inclusive of dep. and amort.	(37,877)	(34,570)
Gross profit	$ 5,944	$ 5,988
Gross margin %	13.60%	14.80%
Operating expenses:
Selling, general and administrative	$ (8,427)	$ (9,423)
Legal settlement awards		(1,890)
Total operating costs and expenses	(8,427)	(11,313)
Operating (loss)	(2,483)	(5,325)
Other (expense)/income:
Other income: employee retention credit (ERC)		5,622
Other income: Paycheck Protection Program loan forgiveness		4,000
Interest expense	(240)	(187)
Gain on sale of equipment	36	(98)
Total other (expense)/income	(204)	9,337
(Loss)/income before income tax provision	(2,687)	4,012
Income tax benefit/ (provision)	570	43
Net (loss)/income	(2,117)	4,055
Total Assets	45,294	50,293
Capital expenditures	1,319	267
Foreign derived sales	10,974	8,444
Operating Segments | ATG
Business Segments
Revenues from unaffiliated customers	35,185	31,677
Cost of goods sold, inclusive of dep. and amort.	(31,055)	(25,929)
Gross profit	$ 4,130	$ 5,748
Gross margin %	11.70%	18.10%
Operating expenses:
Selling, general and administrative	$ (6,592)	$ (7,661)
Legal settlement awards		(1,800)
Total operating costs and expenses	(6,592)	(9,461)
Operating (loss)	(2,462)	(3,713)
Other (expense)/income:
Other income: employee retention credit (ERC)		4,584
Other income: Paycheck Protection Program loan forgiveness		4,000
Interest expense	(239)	(185)
Gain on sale of equipment	36	(98)
Total other (expense)/income	(203)	8,301
(Loss)/income before income tax provision	(2,665)	4,588
Income tax benefit/ (provision)	565	(78)
Net (loss)/income	(2,100)	4,510
Total Assets	35,766	40,870
Capital expenditures	1,234	263
Foreign derived sales	10,541	7,933
Operating Segments | CPG
Business Segments
Revenues from unaffiliated customers	8,636	8,881
Cost of goods sold, inclusive of dep. and amort.	(6,822)	(8,641)
Gross profit	$ 1,814	$ 240
Gross margin %	21.00%	2.70%
Operating expenses:
Selling, general and administrative	$ (1,835)	$ (1,762)
Legal settlement awards		(90)
Total operating costs and expenses	(1,835)	(1,852)
Operating (loss)	(21)	(1,612)
Other (expense)/income:
Other income: employee retention credit (ERC)		1,038
Interest expense	(1)	(2)
Total other (expense)/income	(1)	1,036
(Loss)/income before income tax provision	(22)	(576)
Income tax benefit/ (provision)	5	121
Net (loss)/income	(17)	(455)
Total Assets	9,528	9,223
Capital expenditures	85	4
Foreign derived sales	$ 433	$ 511