Investment in account receivable (Details) - USD ($)	Jun. 30, 2015	Apr. 10, 2015	Dec. 31, 2014
Investment in account receivable consists of the following
Face value	$ 0	$ 0	$ 117,000
Unamortized discount	0	0	(2,250)
Net balance	0	0	114,750
Company will receive an investment in an account receivable with installment payments per year for 11 years	0	117,000	0
Company will receive an investment in an account receivable total	$ 0	$ 1,287,000	$ 0
Shares of Mentor stock exercise of series D warrants	0	757,059	0
Shares of Mentor stock exercise of series D warrants per share	$ 0	$ 1.60	$ 0
Mentor shares exchanged for all or part of the installment payments	$ 0	$ 313,820	$ 0
Company shares exchanged in the transaction, resulting in a discount from the face value of the account receivable	0.00%	17.87%	0.00%
Amortized monthly interest in years	0	11	0