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Discontinued operations - CW-Bali (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
gal
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
gal
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest $ (1,071,001) $ (142,659) $ (1,150,850) $ (127,974)    
CW Bali [Member]            
Impairment of Long-Lived Assets Held-for-use 1,000,000          
Translation Adjustment Functional to Reporting Currency, Net of Tax 549,555   549,555      
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures $ 832,000   $ 832,000      
Plant Capacity | gal 790,000   790,000      
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest         $ (2,500,000) $ (861,000)