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Property and equipment (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Property and equipment is comprised of the following:    
Computers $ 22,251 $ 21,813
Furniture and fixtures 23,043 21,139
Machinery and vehicles 169,740 189,335
Capitalized website costs   1,166
Capitalized database costs   3,000
Property and equipment gross 215,034 236,453
Accumulated depreciation and amortization (178,482) (189,713)
Net Property and equipment $ 36,552 $ 46,740