Note 2 - Revenue from Contracts with Customers (Details Textual) - USD ($) |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Accounts Receivable, Allowance for Credit Loss, Ending Balance | $ 0 | $ 0 |
| Contract with Customer, Liability, Current | 464,223 | 318,552 |
| Capitalized Contract Cost, Net, Total | 0 | 3,480 |
| Prepaid Expenses and Other Current Assets [Member] | ||
| Deferred Costs of Revenue | $ 453,607 | $ 294,115 |
| X | ||||||||||
- Definition Amount of deferred costs of revenue as of the balance sheet date. 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 obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|