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Note A - Overview and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] |
|  | Year Ended December 31, |
In thousands |  | 2022 |  |  | 2021 |
Revenue (1) |  |  |  |  |  |  |  |
United States |  | $ | 183,470 |  |  | $ | 175,437 |
Other countries |  |  | 22,808 |  |  |  | 19,159 |
Total revenue |  | $ | 206,278 |  |  | $ | 194,596 |
|  | December 31, |
In thousands |  | 2022 |  |  | 2021 |
Property, plant and equipment, net (2) |  |  |  |  |  |  |  |
United States |  | $ | 10,219 |  |  | $ | 7,549 |
Other countries |  |  | 304 |  |  |  | 198 |
Total property, plant and equipment |  | $ | 10,523 |  |  | $ | 7,747 |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Year Ended December 31,
In thousands |  | 2022 |  | 2021
Top ten customers |  | 50.6% |  | 53.0%
Top twenty-five customers |  | 72.5% |  | 72.6%
Schedule of Allowance for Doubtful Accounts [Table Text Block] |
|  | Year Ended December 31, |
In thousands |  | 2022 |  |  | 2021 |
Balance at beginning of year |  | $ | 266 |  |  | $ | 241 |
Net charges to expense |  |  | (92 | ) |  |  | 95 |
Amounts recovered against the allowance |  |  | (11 | ) |  |  | (70 | )
Balance at end of year |  | $ | 163 |  |  | $ | 266 |
Property, Plant and Equipment [Table Text Block] |
|  | Years |
Buildings and improvements |  | 3 to 40 |
Software |  | 2 to 10 |
Equipment and furniture |  | 3 to 20 |

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