Note 7 Related Party Transactions Related Party Transactions - Participation Interests Purchased - Subnote (Details)	Mar. 31, 2020 USD ($)	Mar. 02, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 27, 2018 USD ($)
Related Party Transaction
Participating Mortgage Loans, Participation Liabilities, Amount	$ 67,700,000	$ 49,800,000	$ 103,200,000
Unfunded Commitment Outstanding	107,000,000		$ 3,600,000
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Related Party Transaction
Participating Interests				25
Participating Mortgage Loans, Participation Liabilities, Amount				$ 4.3
Unfunded Commitment Outstanding	$ 0.3