CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income (loss)	$ (87)	$ 872
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Share-based compensation	71	37
Depreciation and amortization	369	522
Gain on sale of property, plant and equipment	(188)	(55)
Bad debt expense (recovery)	(133)	534
Non-cash lease (benefit) expense	(8)	3
Forgiveness of PPP loan	0	(1,111)
Changes in operating assets and liabilities:
Accounts receivable, net	1,346	(337)
Contract assets	345	(313)
Inventories	(13)	(30)
Prepaid expenses and other current assets	(147)	44
Other assets, net	(46)	(52)
Accounts payable and accrued expenses	(585)	(200)
Contract liabilities	(144)	(557)
Net cash provided by (used in) operating activities	780	(643)
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	184	56
Purchases of property, plant and equipment	(955)	(202)
Payments received on note receivable	4	6
Net cash used in investing activities	(767)	(140)
Cash flows from financing activities:
Proceeds from PPP loan	0	1,111
Repurchase of common shares	(250)	0
Net cash provided by (used in) financing activities	(250)	1,111
Change in cash	(237)	328
Cash, beginning of period	3,676	3,745
Cash, end of period	3,439	4,073
Supplemental schedule of non-cash investing and financing activities:
Shares of common stock received in exchange for property, plant and equipment	$ 76	$ 0