Retirement Arrangement (Details)	6 Months Ended
Nov. 30, 2017
Retirement Benefits [Abstract]
One-time founder's bonus, description	Joseph F. Hughes, Chairman of the Board, Chief Executive Officer, President and Treasurer, retired on July 5, 2017. The Board of Directors of the Company has elected Christopher Hughes, formerly Senior Vice President of TSR, Inc., to succeed Joseph F. Hughes as Chairman of the Board, Chief Executive Officer, President and Treasurer. Upon his retirement, the Board awarded Joseph F. Hughes a one-time founder’s bonus of $100,000.
Retirement benefits, description	The total amount of these retirement benefits were accrued in the quarter ended August 31, 2017, resulting in charges amounting to approximately $180,000 which were included in selling, general and administrative expenses for the six months ended November 30, 2017.
Lease expires date	May 31, 2018

No definition available.

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the deferred compensation arrangement, including fixed amounts and determinable awards, or the method for determining payments and awards, the timing of such payments and awards, and any requisite service or performance criteria, as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of nature and type of retirement benefits. Includes, but is not limited to, plan utilized, employee group covered, type of plan formula and funding policy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=77993564&loc=d3e4179-114921

+ Details

Name:	us-gaap_GeneralDiscussionOfPensionAndOtherPostretirementBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration