Property and equipment (Tables)
|6 Months Ended|
Jun. 30, 2015
|Property and equipment Abstract]|
|Schedule of Property and Equipment||
Tabular disclosure of public utility physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, deprecation expense and method used, including composite depreciation, and accumulated deprecation.
Reference 1: http://www.xbrl.org/2003/role/presentationRef