CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES:
Net income	$ 11,257	$ 19,343
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	4,590	4,214
(Gain) loss on disposal of property, plant and equipment	5	(4)
Provision for doubtful accounts	97	102
Issuance of non-employee director shares	194	150
Deferred tax provision	(51)	159
Changes in operating assets and liabilities:
Accounts receivable	45,165	(48,862)
Inventories	(3,221)	2,406
Prepaid expenses	(925)	(2,622)
Other assets	242	669
Accounts payable	(36,062)	31,601
Accrued liabilities	1,744	1,169
Net cash flows from operating activities	23,035	8,325
INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(7,545)	(8,437)
Proceeds from sale of property, plant and equipment	42	7
Net cash flows from investing activities	(7,503)	(8,430)
FINANCING ACTIVITIES:
Net proceeds under credit facility		5,000
Payments of cash dividends	(4,106)	(4,103)
Net payments on other long-term obligations	(184)	(185)
Finance lease obligation payments	(10)	(10)
Net cash flows from financing activities	(4,300)	702
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS	(188)	(398)
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS	11,044	199
CASH AND TEMPORARY INVESTMENTS, beginning of period	26,072	27,037
CASH AND TEMPORARY INVESTMENTS, end of period	37,116	27,236
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest	1,203	1,655
Cash payments for income taxes, net of refunds	$ 1,710	$ 5,249