Subsequent events (Details)	Jul. 18, 2016 USD ($) $ / shares
Subsequent events Details
Mentor's request to rescind the Bhang Agreement	$ 1,500,000
Interest rate for the period of time	10.00%
Bhang may return some or all original shares they purchased	$ 117,000
Mentor in exchange for the original purchase price per share | $ / shares	$ 1.95