CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net earnings (loss)	$ 1,131	$ (1,303)
Adjustments to reconcile net earnings (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	4,110	4,776
Stock-based compensation	813	779
Amortization of deferred financing costs	115	120
Deferred income taxes	(756)	(505)
Net unrealized losses on foreign currency revaluation	573	1,002
Other, net	950	518
Changes in operating assets and liabilities:
Accounts receivable	(2,285)	2,528
Unbilled receivables	5,569	893
Inventories	(4,239)	(4,734)
Account payable	(8,493)	(777)
Accrued expenses	(5,044)	(3,616)
Other operating assets/liabilities, net	1,299	645
Net cash (used in) provided by operating activities	(6,257)	326
Cash flows from investing activities:
Purchases of property, plant and equipment	(2,437)	(2,216)
Proceeds from disposal/sale of property, plant and equipment	2	48
Net cash used in investing activities	(2,435)	(2,168)
Cash flows from financing activities:
Dividends paid to common stockholders	(800)	(791)
Borrowings under revolving credit line	10,000	0
Repayments of revolving credit line	(10,000)	0
Repayments of long-term debt	(744)	(781)
Net cash used in financing activities	(1,544)	(1,572)
Effect of exchange rate changes on cash and cash equivalents	(484)	912
Net decrease in cash and cash equivalents	(10,720)	(2,502)
Cash and cash equivalents - beginning of period	53,911	69,354
Cash and cash equivalents - end of period	43,191	66,852
Cash paid during the period for:
Income taxes, net of refunds received	926	1,040
Interest payment	$ 1,216	$ 1,079