CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 872	$ (5,927)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Share-based compensation	37	74
Depreciation and amortization	522	604
Gain on sale of property, plant and equipment	(55)	0
Bad debt expense	534	448
Non-cash lease expense	3	5
Forgiveness of PPP loan	(1,111)	0
Loss on asset impairment	0	4,490
Changes in operating assets and liabilities:
Accounts receivable, net	(337)	(348)
Contract assets	(313)	229
Inventories	(30)	0
Prepaid expenses and other current assets	44	51
Other assets	(52)	(200)
Accounts payable and accrued expenses	(200)	(110)
Contract liabilities	(557)	333
Net cash used in operating activities	(643)	(351)
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	56	0
Purchases of property, plant and equipment	(202)	(102)
Payments received on note receivable (included in Prepaid expenses and other current assets)	6	7
Net cash used in investing activities	(140)	(95)
Cash flows from financing activities:
Proceeds from PPP loan	1,111	1,111
Repurchase of common shares	0	(524)
Net cash provided by financing activities	1,111	587
Change in cash	328	141
Cash, beginning of period	3,745	3,523
Cash, end of period	$ 4,073	$ 3,664