CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 1,204	$ (6,177)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Share-based compensation	46	113
Depreciation and amortization	731	843
Loss on sale of property, plant and equipment	94	0
Bad debt expense	534	426
Non-cash lease expense	(1)	10
Forgiveness of PPP loan	(2,222)	0
Loss on asset impairment	0	4,490
Changes in operating assets and liabilities:
Accounts receivable, net	(943)	126
Contract assets	97	539
Inventories	(67)	0
Prepaid expenses and other current assets	50	45
Other assets	(3)	(136)
Accounts payable and accrued expenses	(321)	(60)
Contract liabilities	(252)	(175)
Net cash (used in) provided by operating activities	(1,053)	44
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	171	0
Purchases of property, plant and equipment	(275)	(118)
Payments received on note receivable (included in Prepaid expenses and other current assets)	9	10
Net cash used in investing activities	(95)	(108)
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	(37)	522
Cash, beginning of period	3,745	3,523
Cash, end of period	$ 3,708	$ 4,045