XML 61 R45.htm IDEA: XBRL DOCUMENT v3.21.1
Note 10 - Credit Quality of Rents Receivable - Allowance for Doubtful Accounts (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Beginning balance $ 13,000
Accounts receivable (written off) (13,000)
Ending Balance