CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ (2,928)	$ 2,326
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Share-based compensation	90	48
Depreciation and amortization	682	951
(Gain) loss on sale of property, plant and equipment	(40)	76
Bad debt expense (recovery)	(9)	442
Non-cash lease expense (benefit)	398	(4)
Loss on right-of-use operating lease asset impairment	820	0
Forgiveness of PPP loan	0	(2,222)
Changes in operating assets and liabilities:
Accounts receivable	3,018	(1,721)
Employee retention tax credit receivable	0	(650)
Contract assets	71	(163)
Inventories	52	(67)
Prepaid expenses and other current assets	(103)	33
Other assets	(98)	41
Accounts payable and accrued expenses	(794)	322
Contract liabilities	83	(479)
Net cash provided by (used in) operating activities	1,242	(1,067)
Cash flows from investing activities:
Proceeds from sale of property, plant and equipment	271	229
Purchases of property, plant and equipment	(2,537)	(355)
Payments received on note receivable	4	13
Net cash used in investing activities	(2,262)	(113)
Cash flows from financing activities:
Proceeds from PPP loan	0	1,111
Repurchase of common shares	(250)	0
Principal payments under finance lease obligations	(53)	0
Net cash provided by (used in) financing activities	(303)	1,111
Change in cash	(1,323)	(69)
Cash, beginning of year	3,676	3,745
Cash, end of year	2,353	3,676
Supplemental schedule of non-cash investing and financing activities:
Shares of common stock received in exchange for property, plant and equipment	$ 76	$ 0