Furniture and equipment - Summary of furniture and equipment (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Furniture and equipment, gross	$ 69,919	$ 54,919
Less accumulated depreciation and amortization	52,381	47,863
Furniture and equipment, net	17,538	7,056
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Furniture and equipment, gross	1,505	1,505
Equipment
Property, Plant and Equipment [Line Items]
Furniture and equipment, gross	18,091	18,091
Automobile
Property, Plant and Equipment [Line Items]
Furniture and equipment, gross	15,000
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Furniture and equipment, gross	$ 35,323	$ 35,323

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived 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, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived 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, furniture and fixtures, and computer equipment.

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