CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
OPERATING ACTIVITIES:
Net income	$ 19,343	$ 14,270
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	4,214	3,518
(Gain) Loss on disposal of property, plant and equipment	(4)	133
Provision for doubtful accounts	102	115
Issuance of non-employee director shares	150	150
Deferred tax provision	159	182
Changes in operating assets and liabilities:
Accounts receivable	(48,862)	(15,585)
Inventories	2,406	(13,024)
Prepaid expenses	(2,622)	(287)
Other assets	669	(21)
Accounts payable	31,601	12,823
Accrued liabilities	1,169	3,817
Net cash flows from operating activities	8,325	6,091
INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(8,437)	(9,392)
Proceeds from sale of property, plant and equipment	7	132
Net cash flows from investing activities	(8,430)	(9,260)
FINANCING ACTIVITIES:
Net borrowings under credit facility	5,000	5,000
Payments of cash dividends	(4,103)	(4,098)
Net proceeds (payments) on other long-term obligations	(185)	374
Finance lease obligation payments	(10)
Net cash flows from financing activities	702	1,276
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS	(398)	(289)
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS	199	(2,182)
CASH AND TEMPORARY INVESTMENTS, beginning of period	27,037	21,895
CASH AND TEMPORARY INVESTMENTS, end of period	27,236	19,713
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest	1,655	1,121
Cash payments for income taxes, net of refunds	$ 5,249	$ 3,699