Notes to Condensed Consolidated Financial Statements (Details Narrative) - shares	3 Months Ended	6 Months Ended
Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted Average Number of Shares Outstanding, Basic and Diluted	3,487,192	3,478,716	3,487,299	3,478,795

Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

No definition available.

Name:	us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration