Acquisition of patents (Tables)

12 Months Ended

May 31, 2017

Intangible Assets Activity

The following presents intangible assets activity:

	May 31, 2017			May 31, 2016
Gross carrying amounts	$	3,500,000		$	3,500,000
Accumulated amortization		(1,618,770	)		(1,268,750	)
Total amortizable intangible assets, net		1,881,230			2,231,250
Patents currently not amortized		35,989			35,989
Carrying value of intangibles, net	$	1,917,219		$	2,267,239