Noncontrolling interests (Details) (USD $)	3 Months Ended
Noncontrolling interests (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Change Due to Net Income Attributable to Parent and Effects of Changes, Net [Abstract]
Net loss attributable to stockholders	$ (617,464)us-gaap_NetIncomeLoss	$ (1,020,045)us-gaap_NetIncomeLoss
Ilios
Noncontrolling Interest [Line Items]
The Company's ownership percentage in subsidiary	65.00%

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.