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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net earnings $ 4,053 $ 1,325
Adjustments to reconcile net earnings to net cash provided by operating activities -    
Depreciation 604 623
Amortization 71 82
Bad debt expense 15 17
Deferred income taxes (111) 39
Net foreign currency transaction losses (gains) 32 (115)
Share-based compensation expense 350 545
Increase in cash surrender value of life insurance (150) (150)
Changes in operating assets and liabilities -    
Accounts receivable 1,395 2,273
Inventories 8,980 11,700
Prepaid expenses and other assets 89 572
Accounts payable (12,966) (1,839)
Accrued liabilities and other (3,578) (1,425)
Accrued income taxes 1,447 522
Net cash provided by operating activities 231 14,169
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from maturities of marketable securities 475 1,720
Purchases of investment securities   (20,011)
Proceeds from sale of investment securities 8,050  
Purchases of property, plant and equipment (352) (73)
Net cash provided by (used for) investing activities 8,173 (18,364)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Cash dividends paid (2,297) (2,319)
Shares purchased and retired (1,797) (1,079)
Proceeds from stock option exercised 11  
Net cash used for financing activities (4,083) (3,398)
Effect of exchange rate changes on cash and cash equivalents 118 (23)
Net increase (decrease) in cash and cash equivalents 4,439 (7,616)
CASH AND CASH EQUIVALENTS at beginning of period 19,711 32,476
CASH AND CASH EQUIVALENTS at end of period 24,150 24,860
SUPPLEMENTAL CASH FLOW INFORMATION:    
Income taxes paid, net of refunds 75 24
Interest paid $ 1 $ 7