Note 13 - Notes Payable (Details Textual) - USD ($) $ in Millions  | 
Feb. 10, 2021  | 
May 04, 2020  | 
|---|---|---|
| Paycheck Protection Program, CARES Act [Member] | ||
| Proceeds from Bank Debt | $ 0.2 | $ 0.2 | 
| X | ||||||||||
- Definition The cash inflow from bank borrowing during the year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  | 
| X | ||||||||||
- Details 
  |