CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (97)	$ (264)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	24	57
Depreciation and amortization	152	196
Gain on sale of property, plant and equipment	(1)	(54)
Bad debt recovery	0	(472)
Non-cash lease (benefit) expense	263	(3)
Changes in operating assets and liabilities:
Accounts receivable, net	(1,384)	97
Contract assets	(66)	352
Inventories	1	2
Prepaid expenses and other current assets	32	0
Other assets, net	(8)	(10)
Accounts payable and accrued expenses	(381)	(305)
Contract liabilities	791	(73)
Net cash used in operating activities	(674)	(477)
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	1	1
Purchases of property, plant and equipment	(79)	(351)
Payments received on note receivable	0	3
Net cash used in investing activities	(78)	(347)
Cash flows from financing activities:
Principal payments under finance lease obligations	(82)	0
Repurchase of common shares	0	(150)
Net cash used in financing activities	(82)	(150)
Change in cash	(834)	(974)
Cash, beginning of period	2,353	3,676
Cash, end of period	1,519	2,702
Supplemental schedule of non-cash investing and financing activities:
Shares of common stock received in exchange for property, plant and equipment	$ 0	$ 76