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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
OPERATING ACTIVITIES:    
Net income $ 3,839 $ 3,360
Adjustments to reconcile net income to net cash used in operating activities:    
Depreciation and amortization 1,346 1,103
Provision for doubtful accounts 51 43
Issuance of non-employee director shares 150 96
Deferred income tax provision (25) (23)
Changes in operating assets and liabilities:    
Accounts receivable (7,353) (19,735)
Inventories (3,457) (5,362)
Prepaid expenses (1,158) (1,712)
Other assets 22 (10)
Accounts payable 2,191 14,400
Accrued liabilities 1,317 149
Net cash flows used in operating activities (3,077) (7,691)
INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (6,393) (5,749)
Net cash flows used in investing activities (6,393) (5,749)
FINANCING ACTIVITIES:    
Net borrowings under credit facility 5,000 10,000
Payments of cash dividends (2,043) (1,929)
Net cash flows from financing activities 2,957 8,071
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS (103) 266
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS (6,616) (5,103)
CASH AND TEMPORARY INVESTMENTS, beginning of period 31,115 38,449
CASH AND TEMPORARY INVESTMENTS, end of period 24,499 33,346
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:    
Cash payments for interest 501 336
Cash payments for income taxes, net of refunds $ 209 $ 1,817