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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, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Operating activities: |  |  |  |  |
Net income (loss) |  |  | $ 12,956,889 | $ 16,649,176 | $ (70,943,484)
Share-based compensation |  |  | 3,687,951 | 1,792,819 | 1,881,401
Adjustments to reconcile net income to net cash used in operating activities: |  |  |  |  |
Prepaid expenses and other current assets |  |  | 30,465 | 10,217,835 | 29,616
Amount due to related parties |  |  | 2,178,445 | $ (453,075) | (415,960)
Income tax payable |  |  | 940,732 |  | (160,480)
Amount due from related party |  |  | 5,481,362 | $ 2,193,604 | (6,853,965)
Net cash (used in) provided by operating activities |  |  | 66,426,213 | $ 45,619,729 | $ (16,525,817)
Investing activities: |  |  |  |  |
Disposition of minority interest in subsidiary |  |  | 5,110,085 |  |
Net cash used in investing activities |  |  | (74,132,349) | $ (90,589,032) | $ (30,696,113)
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 |  |  | 275,783 | 37,080 | $ 135,171
Net cash provided by financing activities |  |  | 15,242,079 | 44,271,754 | 48,826,684
Net increase (decrease) in cash and cash equivalents |  |  | 7,421,528 | (762,601) | 1,152,060
Cash and cash equivalents at the beginning of the year |  |  | 7,068,483 | 7,831,084 | 6,679,024
Cash and cash equivalents at the end of the year |  |  | 14,490,011 | 7,068,483 | 7,831,084
Parent Company [Member] |  |  |  |  |
Operating activities: |  |  |  |  |
Net income (loss) |  |  | 12,956,889 | 16,649,176 | (70,943,484)
Share of results of subsidiaries |  |  | (17,088,195) | (19,391,427) | 67,890,514
Share-based compensation |  |  | 3,687,951 | 1,792,819 | 1,881,401
Adjustments to reconcile net income to net cash used in operating activities: |  |  |  |  |
Prepaid expenses and other current assets |  |  | 11,099 | (27,195) | 344,717
Changes in other current liabilities |  |  | (96,166) | (26,901) | $ 137,390
Amount due to related parties |  |  | (286,526) | $ 286,526 |
Income tax payable |  |  | 108,992 |  |
Net cash (used in) provided by operating activities |  |  | (705,956) | $ (717,002) | $ (689,462)
Investing activities: |  |  |  |  |
Capital contributed to subsidiaries |  |  | $ (33,256,774) | $ (54,638,421) |
Cash collected from subsidiaries when liquidation |  |  |  |  | $ 71,503
Disposition of minority interest in subsidiary |  |  | $ 5,110,085 |  |
Net cash used in investing activities |  |  | (28,146,689) | $ (54,638,421) | $ 71,503
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 |  |  | 275,783 | 37,080 | $ 135,171
Net cash provided by financing activities |  |  | 26,922,578 | 54,661,527 | 135,171
Net increase (decrease) in cash and cash equivalents |  |  | (1,930,067) | (693,896) | (482,788)
Cash and cash equivalents at the beginning of the year |  |  | 4,493,150 | 5,187,046 | 5,669,834
Cash and cash equivalents at the end of the year |  |  | $ 2,563,083 | $ 4,493,150 | $ 5,187,046

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