| Note 6 - Lessee Leases (Details) - USD ($) | 3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
| Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | |
| Details | ||||
| Rental expense under operating agreements | $ 49,896 | $ 45,094 | $ 95,722 | $ 93,767 | 
| X | ||||||||||
| 
- Definition Represents the monetary amount of Rental expense under operating agreements, during the indicated time period. No definition available. 
 | 
| X | ||||||||||
| 
- References No definition available. 
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