Funding agreement (Details)	Dec. 31, 2015 USD ($)	Apr. 27, 2015 USD ($)	Apr. 13, 2015 USD ($)	Feb. 18, 2014 USD ($)
Funding Agreement Details
Purchase up to a interest in MCB				51.00%
MCB was to receive in funding as Mentor received proceeds from warrant exercise				$ 200,000
Allocation of funding to MCB was discretionary and could be reduced				$ 100,000
MCB that the funding would be reduced			$ 100,000
Equity investment in MCB			$ 100,000
Note payable to Mentor by the remaining owner of MCB in 120 equal payments			6.00%
MCB funding		$ 74,000
Converted to note payable in years		10
Conversion resulted in a gain	$ 35,360