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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Cash flows from operating activities:    
Net earnings $ 5,332 $ 3,866
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:    
Depreciation and amortization 9,320 10,476
Stock-based compensation 1,447 1,545
Amortization of deferred financing costs 294 670
Deferred income taxes 1,780 (826)
Net unrealized (gains) losses on foreign currency revaluation (871) 2,107
Other, net 616 892
Changes in operating assets and liabilities:    
Accounts receivable, net (10,541) (13,843)
Unbilled receivables (1,051) 0
Inventories (10,629) (2,658)
Account payable 12,082 492
Accrued expenses (1,251) (2,409)
Other operating assets/liabilities, net (5,286) (694)
Net cash provided by (used in) operating activities 1,242 (382)
Cash flows from investing activities:    
Purchases of property, plant and equipment (5,870) (2,243)
Proceeds from disposal/sale of property, plant and equipment 53 10
Net cash used in investing activities (5,817) (2,233)
Cash flows from financing activities:    
Repayments of long-term debt (7,525) (15,400)
Dividends paid to common stockholders (1,589) (1,562)
Borrowings under revolving credit line 0 6,000
Repayments of revolving credit line 0 (2,000)
Reduction in notes payable 0 (213)
Net cash used in financing activities (9,114) (13,175)
Effect of exchange rate changes on cash and cash equivalents 65 1,042
Net decrease in cash and cash equivalents (13,624) (14,748)
Cash and cash equivalents - beginning of period 69,354 73,411
Cash and cash equivalents - end of period 55,730 58,663
Cash paid during the period for:    
Income tax payments, net of refunds received 5,073 881
Interest payments $ 2,260 $ 2,336