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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
OPERATING ACTIVITIES:    
Consolidated net income $ 5,687 $ 3,996
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 1,873 1,849
Loss on disposal of equipment   4
Loss on deconsolidation of subsidiary 83  
Provision for doubtful accounts 95 92
Excess tax benefit from stock-based compensation (22) (127)
Issuance of non-employee director shares 96 75
Deferred income tax provision (124) 12
Changes in operating assets and liabilities:    
Accounts receivable (15,356) (20,592)
Inventories (744) (6,577)
Prepaid expenses (1,770) (979)
Accounts payable 10,438 18,341
Accrued liabilities 1,023 3,107
Net cash flows from operating activities 1,279 (799)
INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (2,012) (1,721)
Payments received on notes receivable 19 57
Net cash flows from investing activities (1,993) (1,664)
FINANCING ACTIVITIES:    
Payments of cash dividends (3,387) (3,142)
Proceeds from stock option exercises 180 415
Excess tax benefit from stock-based compensation 22 127
Net cash flows from financing activities (3,185) (2,600)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS 87 (115)
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS (3,812) (5,178)
CASH AND TEMPORARY INVESTMENTS, beginning of period 42,864 48,591
CASH AND TEMPORARY INVESTMENTS, end of period 39,052 43,413
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:    
Cash payments for interest 485 433
Cash payments for income taxes, net of refunds $ 3,090 $ 334