Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 5,763	$ 38
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,497	4,138
Unrealized foreign currency gain	(199)	(313)
Net gain on interest rate swaps	(53)	(58)
Fair value adjustments to earnout liabilities		3,897
Earnout payments	(247)	(2,155)
(Gain) / loss on sale of property and equipment	(9)	77
Gain on divestitures	(11,177)
Debt discount amortization	291	252
Share-based compensation expense	626	9
Bad debt expense	146	217
Inventory reserve expense	296	165
Deferred income tax expense	(1,215)
Changes in operating assets and liabilities, net of divestitures:
Accounts receivable	(412)	6,505
Costs and estimated earnings in excess of billings on uncompleted contracts	(2,662)	4,920
Inventories	(739)	(110)
Prepaid expense and other current assets	1,494	361
Deferred charges and other assets	258	589
Accounts payable and accrued expenses	6,989	(13,428)
Billings in excess of costs and estimated earnings on uncompleted contracts	(2,227)	(944)
Income taxes payable	3,043	206
Other liabilities	(215)	287
Net cash provided by operating activities	3,248	4,653
Cash flows from investing activities:
Acquisitions of property and equipment	(466)	(410)
Net cash proceeds from divestitures	30,692
Proceeds from sale of property and equipment	112	11
Net cash provided by (used in) investing activities	30,338	(399)
Cash flows from financing activities:
Net repayments on revolving credit lines	(2,336)
Repayments of debt	(28,156)	(4,038)
Payments on capital leases and sale-leaseback transactions	(171)	(186)
Proceeds from employee stock purchase plan, exercise of stock options, and dividend reinvestment plan	64	1,199
Dividends paid to common shareholders		(2,580)
Net cash used in financing activities	(30,599)	(5,605)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	376	184
Net increase (decrease) in cash, cash equivalents and restricted cash	3,363	(1,167)
Cash, cash equivalents and restricted cash at beginning of period	30,659	48,006
Cash, cash equivalents and restricted cash at end of period	34,022	46,839
Cash paid during the period for:
Interest	1,456	1,445
Income taxes	594	$ 490
Non-cash transaction:
Net consideration receivable from divestiture	$ 1,979