Business Segments - Summary of company's operations (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Segments
Revenues from unaffiliated customers	$ 10,991			$ 10,915			$ 33,389	$ 30,003
Cost of goods sold, inclusive of dep. & amort.	(9,468)			(9,143)			(28,060)	(25,366)
Gross profit	1,523			1,772			5,329	4,637
Operating Expenses:
Selling, general and administrative	(1,943)			(2,721)			(6,196)	(6,903)
Legal settlement awards				(1,890)				(1,890)
Operating (loss)/income	420			2,839			867	4,156
Other income/(expense):
Paycheck Protection Program loan forgiveness				4,000				4,000
Interest expense	(50)			(5)			(194)	(132)
Gain on sale of equipment							26
Total other (expense)/income, net	(50)			5,973			(168)	9,490
(Loss) income before income taxes	(470)			3,134			(1,035)	5,334
Income tax (benefit)/provision	(154)			(104)			(234)	369
Net (loss)/income	(316)	$ (810)	$ 325	3,238	$ 1,186	$ 541	(801)	4,965
Operating Segments
Business Segments
Revenues from unaffiliated customers	10,991			10,915			33,389	30,003
Cost of goods sold, inclusive of dep. & amort.	(9,468)			(9,143)			(28,060)	(25,366)
Gross profit	$ 1,523			$ 1,772			$ 5,329	$ 4,637
Gross margin %	13.90%			16.20%			16.00%	15.50%
Operating Expenses:
Selling, general and administrative	$ (1,943)			$ (2,721)			$ (6,196)	$ (6,903)
Legal settlement awards				(1,890)				(1,890)
Total operating costs and expenses	(11,411)			(13,754)			(34,256)	(34,159)
Operating (loss)/income	(420)			(2,839)			(867)	(4,156)
Other income/(expense):
Employee retention credit (ERC)				1,978				5,622
Paycheck Protection Program loan forgiveness				4,000				4,000
Interest expense	(50)			(5)			(194)	(132)
Gain on sale of equipment							26
Total other (expense)/income, net	(50)			5,973			(168)	9,490
(Loss) income before income taxes	(470)			3,134			(1,035)	5,334
Income tax (benefit)/provision	(154)			(104)			(234)	369
Net (loss)/income	(316)			3,238			(801)	4,965
Capital expenditures	497			55			887	68
Operating Segments | ATG
Business Segments
Revenues from unaffiliated customers	8,823			8,449			26,739	23,495
Cost of goods sold, inclusive of dep. & amort.	(7,973)			(6,762)			(22,843)	(19,214)
Gross profit	$ 850			$ 1,687			$ 3,896	$ 4,281
Gross margin %	9.60%			20.00%			14.60%	18.20%
Operating Expenses:
Selling, general and administrative	$ (1,541)			$ (2,240)			$ (4,890)	$ (5,586)
Legal settlement awards				(1,800)				(1,800)
Total operating costs and expenses	(9,514)			(10,802)			(27,733)	(26,600)
Operating (loss)/income	(691)			(2,353)			(994)	(3,105)
Other income/(expense):
Employee retention credit (ERC)				1,598				4,584
Paycheck Protection Program loan forgiveness				4,000				4,000
Interest expense	(50)			(5)			(194)	(130)
Gain on sale of equipment							26
Total other (expense)/income, net	(50)			5,593			(168)	8,454
(Loss) income before income taxes	(741)			3,240			(1,162)	5,349
Income tax (benefit)/provision	(203)			(83)			(263)	370
Net (loss)/income	(538)			3,323			(899)	4,979
Capital expenditures	451			54			841	64
Operating Segments | CPG
Business Segments
Revenues from unaffiliated customers	2,168			2,466			6,650	6,508
Cost of goods sold, inclusive of dep. & amort.	(1,495)			(2,381)			(5,217)	(6,152)
Gross profit	$ 673			$ 85			$ 1,433	$ 356
Gross margin %	31.00%			3.40%			21.50%	5.50%
Operating Expenses:
Selling, general and administrative	$ (402)			$ (481)			$ (1,306)	$ (1,317)
Legal settlement awards				(90)				(90)
Total operating costs and expenses	(1,897)			(2,952)			(6,523)	(7,559)
Operating (loss)/income	271			(486)			127	(1,051)
Other income/(expense):
Employee retention credit (ERC)				380				1,038
Interest expense								(2)
Total other (expense)/income, net				380				1,036
(Loss) income before income taxes	271			(106)			127	(15)
Income tax (benefit)/provision	49			(21)			29	(1)
Net (loss)/income	222			(85)			98	(14)
Capital expenditures	$ 46			$ 1			$ 46	$ 4