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Note 4 - Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2020
Notes Tables |
Restrictions on Cash and Cash Equivalents [Table Text Block] |
|  | March 31, 2020 |  |  | December 31, 2019 |
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 |

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