CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES:
Net income	$ 3,360	$ 3,064
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	1,103	1,032
Provision for doubtful accounts	$ 43	52
Excess tax benefit from stock-based compensation		(101)
Issuance of non-employee director shares	$ 96	96
Deferred income tax provision	(23)	(19)
Changes in operating assets and liabilities:
Accounts receivable	(19,735)	(272)
Inventories	(5,362)	(6,071)
Prepaid expenses	(1,712)	(2,629)
Other assets	(10)	(306)
Accounts payable	14,400	9,878
Accrued liabilities	149	(1,667)
Net cash flows from (used in) operating activities	(7,691)	3,057
INVESTING ACTIVITIES:
Purchases of property, plant and equipment	$ (5,749)	(1,416)
Payments received on notes receivable		1
Net cash flows from (used in) investing activities	$ (5,749)	$ (1,415)
FINANCING ACTIVITIES:
Net borrowings under credit facility	10,000
Payments of cash dividends	$ (1,929)	$ (1,809)
Proceeds from stock option exercises		85
Excess tax benefit from stock-based compensation		101
Net cash flows from (used in) financing activities	$ 8,071	(1,623)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS	266	(1,311)
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS	(5,103)	(1,292)
CASH AND TEMPORARY INVESTMENTS, beginning of period	38,449	39,597
CASH AND TEMPORARY INVESTMENTS, end of period	33,346	38,305
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash payments for interest	336	328
Cash payments for income taxes, net of refunds	$ 1,817	$ 1,649