9. Cancellation of Capital Stock (Details) - USD ($)	3 Months Ended
	Aug. 31, 2016	May 31, 2016
Details
Shares repurchased and cancelled, shares	112,152	63,386
Payments for Repurchase of Common Stock	$ 1,378,701	$ 745,878
Average price per share repurchased and cancelled	$ 12.29	$ 11.77
Cumulative Effect on Retained Earnings, before Tax	$ 1,325,994
Shares returned to treasury for cancellation	15,000
Shares returned to treasury for cancellation, value	$ 7,124
Shares returned to treasury for cancellation, value, effect on retained earnings	$ 7,124	$ 715,756