Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Data (Unaudited) (Details)

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Selected Quarterly Financial Data (Unaudited) (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Quarterly Financial Data [Line Items]                      
Revenue $ 16,390 $ 5,463 $ 35,696 $ 5,661 $ 13,153 $ 1,169 $ 2,104 $ 4,115 $ 63,209,687 $ 20,540,769 $ 60,700,190
Gross profit (loss) 12,206 (1,306) 11,120 63 9,879 (12,313) (3,041) (3,313) 22,082,789 (8,788,007) (2,776,437)
Net income (loss) 5,337 6,529 9,811 10,843 9,223 (13,899) (4,522) (5,479) 32,520,131 (14,677,311) 19,558,402
Net income (loss) attributable to owners of the company $ 4,830 $ 5,953 $ 8,957 $ 9,920 $ 8,430 $ (12,823) $ (4,225) $ (5,100) $ 29,659,693 $ (13,717,623) $ 18,352,917
Basic and diluted net income (loss) per ordinary share attributable to owners of the company $ 0.06 $ 0.08 $ 0.11 $ 0.13 $ 0.11 $ (0.16) $ (0.05) $ (0.06) $ 0.38 $ (0.17) $ 0.23