CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES:
Net income	$ 8,660	$ 6,670
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	2,107	1,746
(Gain) loss on disposal of property, plant and equipment	2	(39)
Provision for doubtful accounts	55	56
Issuance of non-employee director shares	150	150
Deferred tax provision	41	207
Changes in operating assets and liabilities:
Accounts receivable	(34,646)	(3,744)
Inventories	(2,107)	(8,439)
Prepaid expenses	(2,537)	(2,145)
Other assets	491	18
Accounts payable	9,574	3,004
Accrued liabilities	356	607
Net cash flows from operating activities	(17,854)	(1,909)
INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(3,155)	(3,880)
Proceeds from sale of property, plant and equipment		60
Net cash flows from investing activities	(3,155)	(3,820)
FINANCING ACTIVITIES:
Net borrowings under credit facility	15,000
Payments of cash dividends	(2,052)	(2,049)
Net proceeds (payments) on other long-term obligations	(95)	499
Finance lease obligation payments	(5)
Net cash flows from financing activities	12,848	(1,550)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS	103	440
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS	(8,058)	(6,839)
CASH AND TEMPORARY INVESTMENTS, beginning of period	27,037	21,895
CASH AND TEMPORARY INVESTMENTS, end of period	18,979	15,056
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest	787	521
Cash payments for income taxes, net of refunds	$ 952	$ 758