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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | December 31, |  |  | December 31, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 1,813 |  |  | $ | 1,847 |  |  | $ | 2,866 |  |  | $ | 5,103 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average common shares outstanding |  |  | 5,866 |  |  |  | 6,212 |  |  |  | 5,893 |  |  |  | 6,250 |
Dilutive effect of stock options and restricted stock |  |  | 7 |  |  |  | 44 |  |  |  | 15 |  |  |  | 54 |
Diluted weighted average common shares outstanding |  |  | 5,873 |  |  |  | 6,256 |  |  |  | 5,908 |  |  |  | 6,304 |
Basic net income per common share |  | $ | 0.31 |  |  | $ | 0.30 |  |  | $ | 0.49 |  |  | $ | 0.82 |
Diluted net income per common share |  | $ | 0.31 |  |  | $ | 0.30 |  |  | $ | 0.49 |  |  | $ | 0.81 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
|  | June 30, 2022 |  |  | Additions |  |  | Revenue Recognized |  |  | Customer Refunds |  |  | December 31, 2022 |
Contract Liabilities (Customer Deposits) |  | $ | 140 |  |  |  | 425 |  |  | $ | (137 | ) |  |  | (3 | ) |  |  | 425 |
|  | June 30, 2021 |  |  | Additions |  |  | Revenue Recognized |  |  | Customer Refunds |  |  | December 31, 2021 |
Contract Liabilities (Customer Deposits) |  | $ | 1,721 |  |  |  | 622 |  |  | $ | (1,721 | ) |  |  | — |  |  |  | 622 |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  | December 31, 2022 |  |  | June 30, 2022 |
Euro Forward Contract– Current Assets |  | $ | 1,448 |  |  | $ | 3,144 |
Swiss Franc Forward Contract – Current Assets |  |  | 297 |  |  |  | 109 |
Total Derivative Contracts – Current Assets |  |  | 1,745 |  |  |  | 3,253 |
Interest Swap – Other noncurrent Assets |  |  | 632 |  |  |  | 453 |
Euro Forward Contract– Other noncurrent Assets |  |  | — |  |  |  | 561 |
Total Derivative Contracts – Other noncurrent Assets |  |  | 632 |  |  |  | 1,014 |
Fair Value Net Asset – all Derivative Contracts |  | $ | 2,377 |  |  | $ | 4,267 |

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