Note 3 - Revenue From Contracts With Customers and Other Revenue - Changes in Contract Liabilities (Details) - USD ($) |
Jun. 30, 2023 |
Jun. 29, 2023 |
Dec. 31, 2022 |
|---|---|---|---|
| Total deferred revenue related to contracts with customers, beginning of period | $ 700,000 | $ 700,000 | $ 700,000 |
| Total deferred revenue, end of period | $ 700,000 | $ 700,000 | $ 700,000 |
| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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