Quarterly report pursuant to Section 13 or 15(d)

Property and equipment (Schedule of Property and Equipment) (Details)

v3.7.0.1
Property and equipment (Schedule of Property and Equipment) (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property and equipment $ 114,309 $ 116,510
Less accumulated depreciation 109,722 110,972
Total property and equipment, net 4,587 5,538
Office and computer equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment $ 114,309 $ 116,510