Purchase of additional equity in WCI (Details) - Jun. 30, 2015 - USD ($)	Total
Purchase of additional equity in WCI: {1}
Mentor purchased an additional interest in WCI	1.00%
Value of additional interest purchased in WCI	$ 25,000
Ownership in WCI	51.00%
Mentor remeasured its previously held equity interest at the acquisition-date fair value and recognized the resulting gain on investment	$ 1,250,964