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FINANCIAL STATEMENT SCHEDULE I (STATEMENT OF CASH FLOWS) (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2015 | May 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
OPERATING ACTIVITIES |  |  |  |  |
Net (loss) income |  |  | $ 43,493,756 | $ 12,956,889 | $ 16,649,176
Share-based compensation |  |  | 2,702,089 | 3,687,951 | 1,792,819
Adjustments to reconcile net income to net cash used in operating activities: |  |  |  |  |
Prepaid expenses and other current assets |  |  | 3,415,637 | 30,465 | 10,217,835
Amount due to a related party |  |  | 1,815,307 | 2,178,445 | (453,075)
Income tax payable |  |  | 4,420,313 | 940,732 |
Net cash provided by operating activities |  |  | 98,671,937 | 66,426,213 | 45,619,729
INVESTING ACTIVITIES |  |  |  |  |
Disposition of minority interest in subsidiary |  |  |  | 5,110,085 |
Net cash used in investing activities |  |  | (66,123,053) | (74,132,349) | (90,589,032)
FINANCING ACTIVITIES |  |  |  |  |
Repurchase of ordinary shares |  |  |  | (1,350,164) |
Proceeds from follow-on equity offering |  |  |  | 30,030,000 | 58,000,000
Insurance cost for follow-on equity offering | $ (2,000,000) | $ (3,400,000) |  | (2,033,041) | (3,375,553)
Proceeds from options exercised |  |  | 1,051,586 | 275,783 | 37,080
Net cash provided by (used in) financing activities |  |  | (30,279,523) | 15,242,079 | 44,271,754
Net increase (decrease) in cash and cash equivalents |  |  | 1,497,467 | 7,421,528 | (762,601)
Cash and cash equivalents at the beginning of the year |  |  | 14,490,011 | 7,068,483 | 7,831,084
Cash and cash equivalents at the end of the year |  |  | 15,987,478 | 14,490,011 | 7,068,483
Parent Company [Member] |  |  |  |  |
OPERATING ACTIVITIES |  |  |  |  |
Net (loss) income |  |  | 43,493,756 | 12,956,889 | 16,649,176
Share of results of subsidiaries |  |  | (46,669,238) | (17,088,195) | (19,391,427)
Share-based compensation |  |  | 2,702,089 | 3,687,951 | 1,792,819
Adjustments to reconcile net income to net cash used in operating activities: |  |  |  |  |
Prepaid expenses and other current assets |  |  | (29,976) | 11,099 | (27,195)
Changes in other current liabilities |  |  | (58,806) | (96,166) | (26,901)
Amount due to a related party |  |  |  | (286,526) | 286,526
Income tax payable |  |  | (108,992) | 108,992 |
Net cash provided by operating activities |  |  | (671,167) | (705,956) | (717,002)
INVESTING ACTIVITIES |  |  |  |  |
Capital contributed to subsidiaries |  |  |  | (33,256,774) | (54,638,421)
Cash collected from subsidiaries when liquidation |  |  |  |  |
Disposition of minority interest in subsidiary |  |  |  | 5,110,085 |
Net cash used in investing activities |  |  |  | (28,146,689) | (54,638,421)
FINANCING ACTIVITIES |  |  |  |  |
Repurchase of ordinary shares |  |  |  | (1,350,164) |
Proceeds from follow-on equity offering |  |  |  | 30,030,000 | 58,000,000
Insurance cost for follow-on equity offering |  |  |  | (2,033,041) | (3,375,553)
Proceeds from options exercised |  |  | 1,051,586 | 275,783 | 37,080
Net cash provided by (used in) financing activities |  |  | 1,051,586 | 26,922,578 | 54,661,527
Net increase (decrease) in cash and cash equivalents |  |  | 380,419 | (1,930,067) | (693,896)
Cash and cash equivalents at the beginning of the year |  |  | 2,563,083 | 4,493,150 | 5,187,046
Cash and cash equivalents at the end of the year |  |  | $ 2,943,502 | $ 2,563,083 | $ 4,493,150

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