Quarterly report pursuant to Section 13 or 15(d)

Property and equipment (Narrative) (Details)

v3.8.0.1
Property and equipment (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Property, Plant and Equipment [Abstract]    
Depreciation expense $ 2,142,000 $ 500
Impairment charge $ 11,480,491