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Investment in OC-BVI - Income statement details (Details) - Ocean Conversion (BVI) Ltd [Member] - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Income attributable to non-controlling interests |  |  |  |
Revenue | $ 803,861 | $ 708,601 | $ 2,358,836 | $ 2,138,238
Cost of revenue | 523,038 | 354,476 | 1,626,152 | 888,628
Gross profit | 280,823 | 354,125 | 732,684 | 1,249,610
General and administrative expenses | 170,385 | 325,721 | 594,980 | 742,645
Income from operations | 110,438 | 28,404 | 137,704 | 506,965
Other income (expense), net | (4,050) | 3,360,304 | (20,191) | 3,458,070
Net income | 106,388 | 3,388,708 | 117,513 | 3,965,035
Income attributable to non-controlling interests | 18,691 | 6,773 | 56,206 | 36,180
Net income attributable to controlling interests | $ 87,697 | $ 3,381,935 | $ 61,307 | $ 3,928,855

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