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Commitments and contingencies (Details 1) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues, Total |  | $ 57,875,707 | $ 57,116,202 | $ 65,559,078
Impairment loss on long-lived assets |  | (2,000,000) | 0 | 0
Loss from operations |  | 1,823,302 | 8,468,064 | 6,461,059
Net loss |  | 3,960,501 | 7,518,701 | 6,265,358
Depreciation |  | 5,765,580 | 5,501,491 | 5,355,771
CW Bali [Member] |  |  |  |
Revenues, Total |  | 91,311 | 368,012 | 471,919
Impairment loss on long-lived assets | $ (2,000,000) | (2,000,000) | 0 | 0
Loss from operations |  | (2,744,361) | (483,544) | (458,393)
Net loss |  | (2,547,332) | (860,783) | (585,744)
Depreciation |  | $ 450,736 | $ 304,673 | $ 279,037

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