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Stock-based Compensation	12 Months Ended
Stock-based Compensation	May 31, 2022
Share-based Payment Arrangement [Abstract]
Stock-based Compensation [Text Block]	7. Stock-based Compensation On May 28, 2010, the Board of Directors of the Company adopted the 2010 Stock Plan (the "Plan"). The maximum number of shares of the Company's common stock available for issuance under the Plan is 514,725 shares. An aggregate of 257,363 shares may be issued under stock options and an aggregate of 257,363 shares may be issued in the form of restricted shares. As at May 31, 2022, there were none issued. At May 31, 2022 and 2021, the Company had no outstanding or exercisable stock options.