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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net earnings $ 3,968 $ 2,816
Adjustments to reconcile net earnings to net cash provided by operating activities -    
Depreciation 827 962
Amortization 83 92
Bad debt expense 48 105
Deferred income taxes (12) 135
Net foreign currency transaction losses (gains) 16 (14)
Share-based compensation expense 366 351
Pension expense 229 213
Increase in cash surrender value of life insurance (135) (135)
Changes in operating assets and liabilities -    
Accounts receivable 816 (1,415)
Inventories 6,900 9,165
Prepaid expenses and other assets 2,182 2,590
Accounts payable (7,990) (3,586)
Accrued liabilities and other (3,537) (3,402)
Accrued income taxes 696 490
Net cash provided by operating activities 4,457 8,367
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of marketable securities (1,327) (1,241)
Proceeds from maturities of marketable securities 680 1,350
Purchases of property, plant and equipment (981) (125)
Net cash used for investing activities (1,628) (16)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Cash dividends paid (4,593) (4,471)
Cash dividends paid to noncontrolling interest of subsidiary 0 (88)
Shares purchased and retired (1,828) 0
Net proceeds from stock options exercised 7 2,884
Proceeds from bank borrowings 31,813 0
Repayments of bank borrowings (33,933) 0
Net cash used for financing activities (8,534) (1,675)
Effect of exchange rate changes on cash and cash equivalents 72 (47)
Net (decrease) increase in cash and cash equivalents (5,633) 6,629
CASH AND CASH EQUIVALENTS at beginning of year 22,973 23,453
CASH AND CASH EQUIVALENTS at end of year 17,340 30,082
SUPPLEMENTAL CASH FLOW INFORMATION:    
Income taxes paid, net of refunds 423 146
Interest paid $ 31 $ 0