Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 1,298,000	$ 3,412,000
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	2,435,000	2,196,000
Unrealized foreign currency (gain) loss	576,000	505,000
Gain on sale of property and equipment	(66,000)
Debt discount amortization	102,000	104,000
Share-based compensation expense	693,000	597,000
Bad debt (recoveries) expense	(41,000)	46,000
Inventory reserve expense	108,000	69,000
Changes in operating assets and liabilities, net of divestitures:
Accounts receivable	(3,493,000)	12,190,000
Costs and estimated earnings in excess of billings on uncompleted contracts	4,319,000	(5,927,000)
Inventories	456,000	1,765,000
Prepaid expense and other current assets	5,269,000	(3,022,000)
Deferred charges and other assets	822,000	491,000
Accounts payable and accrued expenses	1,548,000	(4,611,000)
Billings in excess of costs and estimated earnings on uncompleted contracts	(3,564,000)	(375,000)
Income taxes payable	(499,000)	(6,000)
Other liabilities	(55,000)	(433,000)
Net cash provided by operating activities	9,908,000	7,001,000
Cash flows from investing activities:
Acquisitions of property and equipment	(492,000)	(976,000)
Proceeds from sale of property and equipment	534,000
Net cash provided by (used in) by investing activities	42,000	(976,000)
Cash flows from financing activities:
Borrowings on revolving credit lines	9,200,000	49,500,000
Repayments on revolving credit lines	(11,900,000)	(6,500,000)
Repayments of long-term debt	(625,000)	(625,000)
Payments on finance leases and financing liability	(135,000)	(125,000)
Earnout Payments	(823,000)
Proceeds from employee stock purchase plan and exercise of stock options	128,000
Net cash (used in) provided by financing activities	(4,155,000)	42,250,000
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(356,000)	(1,127,000)
Net increase in cash, cash equivalents and restricted cash	5,439,000	47,148,000
Cash, cash equivalents and restricted cash at beginning of period	37,811,000	36,958,000
Cash, cash equivalents and restricted cash at end of period	43,250,000	84,106,000
Cash paid (received) during the period for:
Interest	641,000	1,056,000
Income taxes	$ (3,717,000)	$ 133,000