Common stock and warrants (Details Narrative) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares issued pursuant to tender offer	17,895,859
Shares of common stock issued	1,561,266
Expense of shares issued for services rendered	$ 144,000
Stock issued for services	0
Conversion, preferred shares converted		41,500
Conversion, common shares issued		16,600