Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 18,541	$ 5,157
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,959	4,211
Provision for bad debts - accounts receivable	4,517	361
Share-based compensation expense	1,061	1,032
Deferred income tax benefit	(2,417)	(1,979)
Gain on sale of property, plant and equipment	0	(3)
Change in fair value of acquisition-related contingent liabilities	1,165	417
Changes in assets and liabilities:
Accounts receivable - trade	(12,261)	(7,230)
Accounts receivable - other	264	280
Contract assets	3,404	5,562
Inventories	492	2,113
Prepaid expenses and other current assets	(1,479)	(2,625)
Other assets	390	(2,102)
Accounts payable and other current liabilities	21,023	(14)
Long-term pension liability	639	812
Other long-term liabilities	464	759
Net cash provided by operating activities	39,762	6,751
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to property, plant and equipment	(4,893)	(4,979)
Proceeds from disposals of property, plant and equipment	0	3
Net cash used in investing activities	(4,893)	(4,976)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings of debt	77,525	94,466
Repayment of debt	(111,838)	(88,667)
Payment of cash dividends	(1,521)	(3,023)
Payment of acquisition-related contingent liability	(1,966)	(961)
Proceeds received on exercise of stock options	33	280
Tax (provision) benefit from vesting of acquisition-related restricted stock	(13)	30
Common stock reacquired and retired	(500)	(1,036)
Net cash provided by (used in) financing activities	(38,280)	1,089
Effect of currency exchange rates on cash	(525)	41
Net increase (decrease) in cash and cash equivalents	(3,936)	2,905
Cash and cash equivalents balance, beginning of period	9,038	5,362
Cash and cash equivalents balance, end of period	$ 5,102	$ 8,267