Conversion to note receivable and subsequent write-off (Details) - USD ($)	Apr. 27, 2015	Apr. 13, 2015	Feb. 18, 2014
Conversion to note receivable and subsequent write-off Details
Purchase interest in MCB			51.00%
Mentor received proceeds from warrant exercises			$ 200,000
MCB was discretionary and could be reduced with no change in Mentor's ownership			$ 100,000
Mentor notified MCB that the funding would be reduced to		$ 100,000
Mentor notified MCB that of funding previously paid to MCB	$ 74,000
Conversion resulted in a gain of 2nd quarter of 2015	35,360
Note was impaired in its entirety in the 4th quarter of 2015	74,000
Accrued and unpaid interest on the note	$ 2,010