CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ (264)	$ 148
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Share-based compensation	57	20
Depreciation and amortization	196	260
Gain on sale of property, plant and equipment	(54)	(49)
Bad debt expense	(472)	0
Non-cash lease (benefit) expense	(3)	2
Changes in operating assets and liabilities:
Accounts receivable, net	97	(567)
Contract assets	352	(25)
Inventories	2	0
Prepaid expenses and other current assets		52
Other assets, net	(10)	(124)
Accounts payable and accrued expenses	(305)	127
Contract liabilities	(73)	(40)
Net cash used in operating activities	(477)	(196)
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	1	50
Purchases of property, plant and equipment	(351)	(60)
Payments received on note receivable	3	4
Net cash used in investing activities	(347)	(6)
Cash flows from financing activities:
Proceeds from PPP loan	0	1,111
Repurchase of common shares	(150)	0
Net cash provided by (used in) financing activities	(150)	1,111
Change in cash	(974)	909
Cash, beginning of period	3,676	3,745
Cash, end of period	2,702	4,654
Supplemental schedule of non-cash investing and financing activities:
Shares of common stock received in exchange for property, plant and equipment	$ 76	$ 0