CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 148	$ (637)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Share-based compensation	20	50
Depreciation and amortization	260	302
Gain on sale of property, plant and equipment	(49)	0
Non-cash lease expense	2	5
Changes in operating assets and liabilities:
Accounts receivable, net	(567)	(181)
Contract assets	(25)	270
Prepaid expenses and other current assets	52	32
Other assets	(124)	(94)
Accounts payable and accrued expenses	127	67
Contract liabilities	(40)	277
Net cash (used in) provided by operating activities	(196)	91
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	50	0
Purchases of property, plant and equipment	(60)	(61)
Payments received on note receivable (included in Prepaid expenses and other current assets)	4	4
Net cash used in investing activities	(6)	(57)
Cash flows from financing activities:
Proceeds from PPP loan	1,111	0
Repurchase of common shares	0	(524)
Net cash provided by (used in) financing activities	1,111	(524)
Change in cash	909	(490)
Cash, beginning of period	3,745	3,523
Cash, end of period	$ 4,654	$ 3,033