Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 14,501	$ 18,263	$ 1,983
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	12,507	10,614	9,853
Unrealized foreign currency (gain) loss	(1,041)	(1,284)	2,047
Fair value adjustments to earnout liabilities	296	(229)	704
Earnout payments	0	(1,007)	(587)
Loss (gain) on sale of property and equipment	110	10	(83)
Amortization of debt discount	427	371	404
Share-based compensation expense	4,533	3,895	3,335
Bad debt expense	1,593	1,340	688
Inventory reserve expense	1,099	140	82
Deferred income tax (benefit) expense	(118)	(39)	0
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	(26,851)	(6,751)	(13,165)
Cost and estimated earnings of billings on uncompleted contracts	5,040	(16,851)	(7,007)
Inventories	(6,896)	(6,023)	(203)
Prepaid expenses and other current assets	1,196	37	5,911
Deferred charges and other assets	(1,420)	2,478	300
Accounts payable	13,852	19,843	806
Accrued expenses	8,340	2,693	(366)
Billings in excess of costs and estimated earnings on uncompleted contracts	21,575	4,405	8,431
Income taxes payable	(1,976)	1,424	1,047
Other liabilities	(2,120)	(3,680)	(882)
Net cash provided by operating activities	44,647	29,649	13,298
Cash flows from investing activities:
Acquisitions of property and equipment	(8,384)	(3,376)	(2,616)
Net proceeds from sale of assets	0	19	533
Cash paid for acquisitions, net of cash acquired	(48,102)	(44,900)	0
Net cash used in investing activities	(56,486)	(48,257)	(2,083)
Cash flows from financing activities:
Borrowings on revolving credit lines	106,600	75,200	51,400
Repayments on revolving credit lines.	(150,600)	(35,900)	(57,100)
Borrowings of long-term debt	75,000	11,000	0
Repayments of long-term debt	(4,985)	(3,120)	(2,738)
Repayments of notes payable	0	(500)	0
Deferred financing fees paid	(363)	(130)	(801)
Deferred consideration paid for acquisitions	(1,247)	0	0
Payments on capital leases and sale-leaseback financing liability	(907)	(600)	(603)
Earnout payments	(2,123)	0	(823)
Proceeds from employee stock purchase plan and exercise of stock options	1,435	671	230
Distributions to non-controlling interest	(1,666)	(1,425)	(107)
Common stock repurchases	0	(7,020)	(5,014)
Net cash (used in) provided by financing activities	21,144	38,176	(15,556)
Effect of exchange rate changes on cash and cash equivalents	(442)	(4,978)	(1,475)
Net (decrease) increase in cash, cash equivalents and restricted cash	8,863	14,590	(5,816)
Cash, cash equivalents and restricted cash at beginning of year	46,585	31,995	37,811
Cash, cash equivalents and restricted cash at end of year	55,448	46,585	31,995
Cash paid (received) during the period for:
Interest	12,098	5,007	2,146
Income taxes	$ 9,916	$ 5,378	$ (2,570)