Property and equipment (Schedule of Property and Equipment) (Details) - USD ($) |
Sep. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Property, Plant and Equipment [Abstract] | ||
| Office and computer equipment | $ 114,309 | $ 116,510 |
| Less accumulated depreciation | 110,196 | 110,972 |
| Total property and equipment, net | $ 4,113 | $ 5,538 |
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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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