Schedule of Revenue by Country (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Revenue by country	$ 899,100	$ 1,066,100	$ 1,759,300	$ 1,910,700
UNITED STATES
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Revenue by country	364,700	301,600	712,200	614,200
BRAZIL
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Revenue by country	174,600	417,800	348,600	583,400
JAPAN
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Revenue by country	115,800	95,600	232,200	165,900
Other Countries [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Revenue by country	$ 244,000	$ 251,100	$ 466,300	$ 547,200