Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 1,864	$ 5,763
Adjustment to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	2,771	3,497
Unrealized foreign currency loss (gain)	561	(199)
Net gain on interest rate swaps	(44)	(53)
Earnout payments		(247)
Gain on sale of property and equipment		(9)
Loss (gain) on divestitures, net of selling costs	70	(11,177)
Debt discount amortization	269	291
Share-based compensation expense	798	626
Bad debt expense	137	146
Inventory reserve expense	217	296
Deferred income tax benefit		(1,215)
Changes in operating assets and liabilities, net of divestitures:
Accounts receivable	(19,627)	(412)
Costs and estimated earnings in excess of billings on uncompleted contracts	(1,607)	(2,662)
Inventories	821	(739)
Prepaid expense and other current assets	1,187	1,494
Deferred charges and other assets	41	258
Accounts payable and accrued expenses	(3,938)	6,989
Billings in excess of costs and estimated earnings on uncompleted contracts	3,443	(2,227)
Income taxes payable	(719)	3,043
Other liabilities	15	(215)
Net cash (used in) provided by operating activities	(13,741)	3,248
Cash flows from investing activities:
Acquisitions of property and equipment	(423)	(466)
Net cash proceeds from divestitures		30,692
Proceeds from sale of property and equipment		112
Net cash (used in) provided by investing activities	(423)	30,338
Cash flows from financing activities:
Net repayments on revolving credit lines		(2,336)
Repayments of debt	(1,700)	(28,156)
Payments on finance leases and financing liability	(116)	(171)
Proceeds from employee stock purchase plan, exercise of stock options, and dividend reinvestment plan		64
Net cash used in financing activities	(1,816)	(30,599)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	447	376
Net (decrease) increase in cash, cash equivalents and restricted cash	(15,533)	3,363
Cash, cash equivalents and restricted cash at beginning of period	44,438	30,659	$ 30,659
Cash, cash equivalents and restricted cash at end of period	28,905	34,022	$ 44,438
Cash paid during the period for:
Interest	1,514	1,456
Income taxes	$ 237	594
Non-cash transaction:
Net consideration receivable from divestiture		$ 1,979