Shareholders' Equity (Details)	3 Months Ended
	Aug. 31, 2016 $ / shares shares
Stockholders' Equity Note [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) | shares	55,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 1.52
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 1.61