Stock-based Compensation	9 Months Ended
Feb. 29, 2020
Share-based Payment Arrangement [Abstract]
Stock-based Compensation [Text Block]	5. 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 10,294,500 shares. An aggregate of 5,147,250 shares may be issued under stock options and an aggregate of 5,147,250 shares may be issued in the form of restricted shares. At February 29, 2020 and February 28, 2019, the Company had no outstanding or exercisable stock options.

The entire disclosure for shareholders' equity and share-based payment arrangement. Includes, but is not limited to, disclosure of policy and terms of share-based payment arrangement, deferred compensation arrangement, and employee stock purchase plan (ESPP).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-URI http://asc.fasb.org/topic&trid=2228938

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