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v3.19.3

Summary of Significant Accounting Policies (Details) - USD ($) | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Cash and money market accounts | $ 2,354,561 | $ 2,521,050
Bank certificates of deposit | 7,199,947 |
Interest rate swaps |  | 40,209
Liabilities: |  |
Interest rate swaps | 86,973 |
Fair Value, Inputs, Level 1 [Member] |  |
Assets: |  |
Cash and money market accounts | 2,354,561 | 2,521,050
Bank certificates of deposit |  |
Interest rate swaps |  |
Liabilities: |  |
Interest rate swaps |  |
Fair Value, Inputs, Level 2 [Member] |  |
Assets: |  |
Cash and money market accounts |  |
Bank certificates of deposit | 7,199,947 |
Interest rate swaps |  | 40,209
Liabilities: |  |
Interest rate swaps | 86,973 |
Fair Value, Inputs, Level 3 [Member] |  |
Assets: |  |
Cash and money market accounts |  |
Bank certificates of deposit |  |
Interest rate swaps |  |
Liabilities: |  |
Interest rate swaps |  |

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