Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 3,412,000	$ 1,864,000
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	2,196,000	2,771,000
Unrealized foreign currency loss	505,000	561,000
Net gain on interest rate swaps		(44,000)
Loss on divestitures, net of selling costs		70,000
Debt discount amortization	104,000	269,000
Share-based compensation expense	597,000	798,000
Bad debt expense	46,000	137,000
Inventory reserve expense	69,000	217,000
Changes in operating assets and liabilities, net of divestitures:
Accounts receivable	12,190,000	(19,627,000)
Costs and estimated earnings in excess of billings on uncompleted contracts	(5,927,000)	(1,607,000)
Inventories	1,765,000	821,000
Prepaid expense and other current assets	(3,022,000)	1,187,000
Deferred charges and other assets	491,000	41,000
Accounts payable and accrued expenses	(4,611,000)	(3,938,000)
Billings in excess of costs and estimated earnings on uncompleted contracts	(375,000)	3,443,000
Income taxes payable	(6,000)	(719,000)
Other liabilities	(433,000)	15,000
Net cash provided by (used in) operating activities	7,001,000	(13,741,000)
Cash flows from investing activities:
Acquisitions of property and equipment	(976,000)	(423,000)
Net cash used in by investing activities	(976,000)	(423,000)
Cash flows from financing activities:
Borrowings on revolving credit lines	49,500,000
Repayments on revolving credit lines	(6,500,000)
Repayments of long-term debt	(625,000)	(1,700,000)
Payments on finance leases and financing liability	(125,000)	(116,000)
Net cash provided by (used in) financing activities	42,250,000	(1,816,000)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,127,000)	447,000
Net increase (decrease) in cash, cash equivalents and restricted cash	47,148,000	(15,533,000)
Cash, cash equivalents and restricted cash at beginning of period	36,958,000	44,438,000
Cash, cash equivalents and restricted cash at end of period	84,106,000	28,905,000
Cash paid during the period for:
Interest	1,056,000	1,514,000
Income taxes	$ 133,000	$ 237,000