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Note 4 - Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash on consolidated balance sheet	$ 606,672	$ 486,604
Restricted cash	654,897	629,651
Total cash and restricted cash	$ 1,261,569	$ 1,116,255	$ 1,131,743	$ 2,249,551

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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