Note 2 - Revenue from Contracts with Customers (Details Textual) |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2020
USD ($)
|
Dec. 31, 2019
USD ($)
|
Dec. 31, 2018
USD ($)
|
|
| Accounts Receivable, Allowance for Credit Loss, Ending Balance | $ 0 | $ 0 | |
| Contract with Customer, Liability, Total | $ 946,884 | $ 464,223 | $ 318,552 |
| Number of Subcontracts with Significant Financing Component | 1 | ||
| Subcontract, Payments Receivable Under Regular Terms, Percent | 90.00% | ||
| Subcontract, Payments Receivable Deferred Until Specific Deliverable is Met, Percent | 10.00% | ||
| Subcontract, Payments Receivable, Interest Rate | 4.50% |
| X | ||||||||||
- Definition The number of subcontracts outstanding which have a significant financing component attached to them. No definition available.
|
| X | ||||||||||
- Definition The percent of the outstanding subcontract which is deferred until specific deliverables are met by the prime contractor. No definition available.
|
| X | ||||||||||
- Definition The interest rate associated with the subcontract No definition available.
|
| X | ||||||||||
- Definition The percent of the outstanding subcontract which is receivable under the regular terms of the subcontract. 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 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
|