Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ (406)	$ 175
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	2,322	2,225
Stock-based compensation expense	531	162
Bad debt expense	32	0
Gain on disposal of fixed assets	(80)	0
Income from equity investment in joint venture	(161)	(421)
Change in operating assets and liabilities:
Accounts receivable	1,616	(707)
Due to related parties	0	15
Inventories	89	68
Prepaid expenses and other current assets	(667)	(200)
Accounts payable and accrued liabilities	(1,038)	1,268
Other	0	(22)
Net cash provided by operating activities	2,238	2,563
Cash flows from investing activities:
Acquisition of fixed assets	(918)	(298)
Proceeds on sales of fixed assets	100	0
Net cash used in investing activities	(818)	(298)
Cash flows from financing activities:
Payments on short- and long-term notes payable	(463)	(296)
Payments on notes payable and finance leases from related parties	(669)	(783)
Net cash used in financing activities	(1,132)	(1,079)
Effect of exchange rate changes on cash	193	62
Net increase in cash and cash equivalents	481	1,248
Cash and cash equivalents, beginning of period	2,060	1,814
Cash and cash equivalents, end of period	2,541	3,062
Supplemental disclosure of cash flow information:
Interest paid	198	162
Income taxes paid (refunds received)	(14)
Income taxes paid (refunds received)		5
Non-cash investing and financing activities:
Equipment acquired from issuance of note payable	359	0
Acquisition of fixed assets included within accounts payable	170	0
Equipment acquired under capital leases	$ 0	$ 104