Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 1,983	$ 8,172	$ 17,707
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	9,853	9,921	10,609
Unrealized foreign currency loss (gain)	2,047	346	(526)
Net gain on interest rate swaps	0	0	(248)
Impairment of intangible assets	0	850	0
Fair value adjustments to earnout liabilities	704	1,193	0
Earnout payments	(587)
(Gain) loss on sale of property and equipment	(83)	63	78
Loss on divestitures			(70)
Amortization of debt discount	404	415	1,060
Share based compensation expense	3,335	1,758	2,668
Bad debt expense	688	928	295
Inventory reserve expense	82	494	316
Deferred income tax expense (benefit)	87	1,038	(940)
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	(13,165)	8,367	(15,616)
Cost and estimated earnings of billings on uncompleted contracts	(7,007)	(9,561)	(5,029)
Inventories	(203)	4,366	(207)
Prepaid expenses and other current assets	5,911	(962)	(7,097)
Deferred charges and other assets	300	(4,095)	758
Accounts payable and accrued expenses	440	336	(4,028)
Billings in excess of costs and estimated earnings on uncompleted contracts	8,431	(17,635)	14,274
Income taxes payable	1,047	460	(1,671)
Other liabilities	(882)	(2,033)	(2,246)
Net cash provided by operating activities	13,298	4,421	10,227
Cash flows from investing activities:
Acquisitions of property and equipment	(2,616)	(3,945)	(5,655)
Net proceeds from sale of assets	533	605	509
Cash paid for acquisitions		(5,895)
Net cash used in investing activities	(2,083)	(9,235)	(5,146)
Cash flows from financing activities:
Borrowings on revolving credit lines	51,400	96,000	45,300
Repayments on revolving credit lines.	(57,100)	(86,800)	(52,947)
Repayments of long-term debt	(2,738)	(5,009)	(2,950)
Deferred financing fees paid	(801)		(1,117)
Payments on capital leases and sale-leaseback financing liability	(603)	(467)	(478)
Earnout payments	(823)
Proceeds from employee stock purchase plan, exercise of stock options, and dividend reinvestment plan	230		76
Distributions to non-controlling interest	(107)
Common stock repurchases	(5,014)
Net cash (used in) provided by financing activities	(15,556)	3,724	(12,116)
Effect of exchange rate changes on cash and cash equivalents	(1,475)	1,943	(445)
Net (decrease) increase in cash, cash equivalents and restricted cash	(5,816)	853	(7,480)
Cash, cash equivalents and restricted cash at beginning of year	37,811	36,958	44,438
Cash, cash equivalents and restricted cash at end of year	31,995	37,811	36,958
Cash paid (received) during the period for:
Interest	2,146	3,172	3,549
Income taxes	$ (2,570)	$ 2,156	$ 5,908