CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 2,326	$ (6,057)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Share-based compensation	48	117
Depreciation and amortization	951	1,082
Loss on sale of property, plant and equipment	76	0
Bad debt expense	442	238
Non-cash lease (benefit) expense	(4)	10
Forgiveness of PPP loan	(2,222)	0
Loss on asset impairment	0	4,490
Changes in operating assets and liabilities:
Accounts receivable, net	(1,721)	(433)
Employee retention tax credit receivable	(650)	0
Contract assets	(163)	625
Inventories	(67)	(187)
Prepaid expenses and other current assets	33	(8)
Other assets	41	26
Accounts payable and accrued expenses	322	(216)
Contract liabilities	(479)	107
Net cash used in operating activities	(1,067)	(206)
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	229	0
Purchases of property, plant and equipment	(355)	(171)
Payments received on note receivable	13	13
Net cash used in investing activities	(113)	(158)
Cash flows from financing activities:
Proceeds from PPP loan	1,111	1,111
Repurchase of common shares	0	(525)
Net cash provided by financing activities	1,111	586
Change in cash	(69)	222
Cash, beginning of year	3,745	3,523
Cash, end of year	$ 3,676	$ 3,745