Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Beginning balance, shares at May. 31, 2019	4,032,878
Beginning balance at May. 31, 2019	$ 13,245,439	$ (527,827)	$ (4,244,679)	$ 8,472,933
Stock-based compensation	72,014			72,014
Net income (loss)			169,808	169,808
Other comprehensive income		60,348		60,348
Ending balance, shares at Aug. 31, 2019	4,032,878
Ending balance at Aug. 31, 2019	$ 13,317,453	(467,479)	(4,074,871)	8,775,103
Beginning balance, shares at May. 31, 2020	3,784,554
Beginning balance at May. 31, 2020	$ 12,257,306	0	(364,104)	11,893,202
Share repurchases, shares	(72,159)
Share repurchases, amount	$ (234,517)			(234,517)
Shares issued to directors and officers upon vesting of RSUs	40,031
Stock-based compensation	$ 182,822			182,822
Net income (loss)			150,659	150,659
Ending balance, shares at Aug. 31, 2020	3,752,426
Ending balance at Aug. 31, 2020	$ 12,205,611	$ 0	$ (213,445)	$ 11,992,166