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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Additional Information) (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Oct. 31, 2017 | Feb. 17, 2016
Basis of presentation |  |  |  |  |
Working capital | $ 74,100,000 |  |  |  |
Net income | 93,855,400 | $ 43,923,997 | $ 13,047,584 |  |
Cash flow from operations | 142,700,000 |  |  |  |
Restricted cash |  |  |  |  |
Restricted cash | 11,989,559 | 15,893,467 |  |  |
Inventories |  |  |  |  |
Inventory write-down |  |  | 62,422 |  |
Prepaid land use rights |  |  |  |  |
Lease Expenses | 572,722 | 557,162 | 595,716 |  |
Impairment of long-lived assets |  |  |  |  |
Long-lived asset impairment | 2,987,668 | 198,689 | 1,622,588 |  |
Shipping and handling |  |  |  |  |
Shipping and handling costs | 4,385,217 | 3,147,594 | 2,708,962 |  |
Government subsidies |  |  |  |  |
Unrestricted cash government subsidies | 6,668,867 | 4,742,635 | 3,578,865 |  |
Government grants related to assets |  | 323,769 | 690,889 |  |
Foreign currency translation |  |  |  |  |
Aggregate amount of cash and cash equivalents and restricted cash denominated in RMB | 66,433,887 | 28,839,371 |  |  |
Noncontrolling interest |  |  |  |  |
Noncontrolling interest | 2,792,480 | 1,629,161 |  |  |
Treasury Stock |  |  |  |  |
Share repurchase program, authorized amount | 5,000,000 |  |  |  |
Purchase price of treasury stock |  |  | 1,350,164 |  |
Investment accounted for under cost-method |  |  |  |  |
Cost Method Investments | 687,074 | 581,581 |  |  |
Operating Leases, Future Minimum Payments Due | 1,069,937 |  |  |  |
Allocated Share-based Compensation Expense | 4,200,273 | 2,702,089 | 3,687,951 |  |
Syed Fire Safety Service Co [Member] |  |  |  |  |
Investment accounted for under cost-method |  |  |  |  |
Cost Method Investment, Ownership Percentage |  |  |  |  | 15.29%
Cost Method Investments |  |  |  | $ 63,793 | $ 581,581
Ordinary shares [Member] |  |  |  |  |
Basis of presentation |  |  |  |  |
Net income |  |  |  |  |
Treasury Stock |  |  |  |  |
Number of shares repurchased |  |  | 2,356,900 |  |

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