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RESTATEMENT OF PREVIOUSLY FILED FINANCIAL INFORMATION - EMPLOYEE STOCK OPTIONS RESTRICTED STOCK AWARD PLAN - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |
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Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2013 | Dec. 31, 2018 | Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation Expenses Charged Against Income For Share Based Awards Included In General And Administrative Expenses | $ 792,836 | $ 808,734 | $ 834,465 | $ 1,007,789 | $ 1,081,199 | $ 1,643,199 | $ 2,083,547 | $ 2,436,035 | $ 3,091,336 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  |  |  |  |  |  |  |  |  |  |  | 2,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 665,160 | 668,340 | 684,020 |  |  | 668,340 |  | 665,160 |  |  |  | 28,955 |
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased | $ 1.64 | $ 3.25 | $ 5.87 | $ 9.91 |  | $ 3.25 |  | $ 1.64 | $ 9.91 | $ 2.64 |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options |  |  |  |  |  |  |  |  |  | $ 702,934 |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  |  |  |  |  |  |  |  |  | 1 year 6 months |  |  |
Stock options |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $ 919,908 | $ 1,239,664 | $ 1,501,300 |  |  | $ 1,239,664 |  | $ 919,908 |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  |  | 1 year 9 months 18 days |  |  | 1 year 8 months 12 days |  | 1 year 7 months 6 days |  |  |  |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $ 3,451,385 | $ 4,046,963 | $ 2,547,688 |  |  | $ 4,046,963 |  | $ 3,451,385 |  | $ 4,451,903 |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  |  | 2 years 3 months 18 days |  |  | 1 year 10 months 24 days |  | 1 year 1 month 6 days |  | 1 year 9 months 18 days |  |  |

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