Significant Accounting Policies (Details) - Options Activity - Share-based Payment Arrangement, Option [Member]	6 Months Ended
Nov. 30, 2019 $ / shares shares
Significant Accounting Policies (Details) - Options Activity [Line Items]
Options Outstanding, Shares \| shares	1,476,209
Option Outstanding, Exercise Price Weighted Average \| $ / shares	$ 2.07
Option Granted, Shares \| shares
Option Granted, Exercise Price Weighted Average \| $ / shares
Option Forfeited, Shares \| shares	(35,250)
Option Forfeited, Exercise Price Weighted Average \| $ / shares	$ 3.26
Option Exercised, Shares \| shares	(54,125)
Option Exercised, Exercise Price Weighted Average \| $ / shares	$ 0.92
Options Outstanding, Shares \| shares	1,386,834
Option Outstanding, Exercise Price Weighted Average \| $ / shares	$ 2.09

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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Gross number of share options (or share units) granted during the period.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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