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Fair Value, Measurement on Recurring and Nonrecurring Basis (Details) | 3 Months Ended | 6 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Sep. 30, 2017 USD ($) item | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Financial assets: |  |  |  |  |  |
Available-for-sale securities |  |  | $ 4,707,085 |  | $ 5,403,463 |
Allowance for loan losses | $ (83,831,575) | $ (81,255,922) | $ (83,255,922) | $ (83,816,575) | (83,711,575) | $ (86,761,575)
Number of impaired loans | item |  |  | 6 |  |  |
Impairment loss on real estate owned |  |  | $ 2,700,000 | $ 11,200,000 |  |
Non-financial assets: |  |  |  |  |  |
Long-lived asset |  |  | 17,354,720 |  | 19,491,805 |
Real Estate Owned |  |  |  |  |  |
Non-financial assets: |  |  |  |  |  |
Long-lived asset |  |  | 17,354,720 |  | 19,491,805 |
Hotel | Real Estate Owned |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Impairment loss on real estate owned | $ 11,200,000 | $ 2,700,000 |  |  |  |
Non-financial assets: |  |  |  |  |  |
Long-lived asset |  |  | 11,540,664 |  | 13,908,812 |
Carrying Value |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Available-for-sale securities |  |  | 4,707,085 |  | 5,403,463 |
Derivative financial instruments |  |  | 488,747 |  | 5,614,990 |
Financial liabilities: |  |  |  |  |  |
Derivative financial instruments |  |  | 1,881,450 |  | 2,451,422 |
Fair Value |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Available-for-sale securities |  |  | 4,707,085 |  | 5,403,463 |
Derivative financial instruments |  |  | 488,747 |  | 5,614,990 |
Financial liabilities: |  |  |  |  |  |
Derivative financial instruments |  |  | 1,881,450 |  | $ 2,451,422 |
Recurring basis | Carrying Value |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Available-for-sale securities |  |  | 4,707,085 |  |  |
Derivative financial instruments |  |  | 488,747 |  |  |
Financial liabilities: |  |  |  |  |  |
Derivative financial instruments |  |  | 1,881,450 |  |  |
Recurring basis | Fair Value |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Available-for-sale securities |  |  | 4,707,085 |  |  |
Derivative financial instruments |  |  | 488,747 |  |  |
Financial liabilities: |  |  |  |  |  |
Derivative financial instruments |  |  | 1,881,450 |  |  |
Nonrecurring basis | Carrying Value |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Impaired loans, net |  |  | 101,284,128 |  |  |
Non-financial assets: |  |  |  |  |  |
Long-lived asset |  |  | 11,540,664 |  |  |
Nonrecurring basis | Fair Value |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Impaired loans, net |  |  | 101,284,128 |  |  |
Non-financial assets: |  |  |  |  |  |
Long-lived asset |  |  | 11,540,664 |  |  |
Level 1 | Recurring basis |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Available-for-sale securities |  |  | 264,553 |  |  |
Level 2 | Recurring basis |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Derivative financial instruments |  |  | 68,989 |  |  |
Financial liabilities: |  |  |  |  |  |
Derivative financial instruments |  |  | 1,881,450 |  |  |
Level 3 | Recurring basis |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Available-for-sale securities |  |  | 4,442,532 |  |  |
Derivative financial instruments |  |  | 419,758 |  |  |
Level 3 | Nonrecurring basis |  |  |  |  |  |
Financial assets: |  |  |  |  |  |
Impaired loans, net |  |  | 101,284,128 |  |  |
Non-financial assets: |  |  |  |  |  |
Long-lived asset |  |  | $ 11,540,664 |  |  |

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