Note 2 - Revenue Recognition (Details Textual) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| Accounts Receivable, Allowance for Credit Loss, Ending Balance | $ 0 | |
| Contract with Customer, Asset, Contract Assets Added | 0 | $ 131,943 |
| Contract with Customer, Liability, Revenue Recognized | 56,423 | $ 492,494 |
| Capitalized Contract Cost, Net, Total | $ 0 | |
| X | ||||||||||
- Definition Represents the amount of contract assets added during the period, resulting in an increase to the asset from contract with customer. No definition available.
|
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| 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
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