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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net earnings $ 2,816 $ 2,115
Adjustments to reconcile net earnings to net cash provided by operating activities -    
Depreciation 962 1,001
Amortization 92 97
Bad debt expense 105 133
Deferred income taxes 135 10
Net foreign currency transaction (gains) losses (14) 1
Stock-based compensation 351 369
Pension expense 213 266
Increase in cash surrender value of life insurance (135) (135)
Changes in operating assets and liabilities -    
Accounts receivable (1,415) 2,823
Inventories 9,165 14,765
Prepaid expenses and other assets 2,590 3,210
Accounts payable (3,586) (7,096)
Accrued liabilities and other (3,402) (1,276)
Accrued income taxes 490 981
Net cash provided by operating activities 8,367 17,264
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of marketable securities (1,241) (250)
Proceeds from maturities of marketable securities 1,350 1,850
Purchases of property, plant and equipment (125) (416)
Net cash (used for) provided by investing activities (16) 1,184
CASH FLOWS FROM FINANCING ACTIVITIES:    
Cash dividends paid (4,471) (4,378)
Cash dividends paid to noncontrolling interest of subsidiary (88) (204)
Shares purchased and retired 0 (2,393)
Proceeds from stock options exercised 2,884 356
Proceeds from bank borrowings 0 6,816
Repayments of bank borrowings 0 (11,084)
Net cash used for financing activities (1,675) (10,887)
Effect of exchange rate changes on cash and cash equivalents (47) 202
Net increase in cash and cash equivalents 6,629 7,763
CASH AND CASH EQUIVALENTS at beginning of period 23,453 13,710
CASH AND CASH EQUIVALENTS at end of period 30,082 21,473
SUPPLEMENTAL CASH FLOW INFORMATION:    
Income taxes paid, net of refunds 146 308
Interest paid $ 0 $ 7