Note 3 - Revenue from Contracts with Customers (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2023 |
Jun. 30, 2022 |
Jun. 30, 2023 |
Jun. 30, 2022 |
Dec. 31, 2022 |
|
| Accounts Receivable, Allowance for Credit Loss, Ending Balance | $ 0 | $ 0 | $ 0 | ||
| Contract with Customer, Liability, Revenue Recognized | 55,088 | $ 55,168 | 110,753 | $ 111,591 | |
| Capitalized Contract Cost, Net | $ 0 | $ 0 | $ 0 | ||
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|