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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Amount of valuation reserve for inventory.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of lessee's right to use underlying asset under operating lease.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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

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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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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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

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Threshold period past due for trade accounts receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Significant Accounting Policies (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
Significant Accounting Policies (Details) - USD ($)	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019	May 31, 2019
Significant Accounting Policies (Details) [Line Items]
Threshold Period Past Due for Write-off of Trade Accounts Receivable			90 days
Inventory Valuation Reserves	$ 55,000		$ 55,000		$ 49,000
Depreciation, Depletion and Amortization	23,822	$ 22,436	77,641	$ 78,118
Amortization of Intangible Assets	$ 5,405	$ 16,666	17,131	49,996
Proceeds from Stock Options Exercised			$ 79,828	$ 82,990
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)			356,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)			$ 2.79
Equity Method Investment, Ownership Percentage	6.00%		6.00%
Deferred Tax Assets, Valuation Allowance	$ 2,821,000		$ 2,821,000		2,459,000
Operating Lease, Right-of-Use Asset	$ 1,767,938		$ 1,767,938
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	476,358	393,865	483,658	592,080
Minimum [Member]
Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life			5 years
Maximum [Member]
Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life			10 years
Distribution Rights [Member]
Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			18 years
Purchased Technology Rights [Member]
Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 years
Patents [Member]
Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			17 years
Accounting Standards Update 2016-02 [Member]
Significant Accounting Policies (Details) [Line Items]
Operating Lease, Right-of-Use Asset	$ 1,942,999		$ 1,942,999
Operating Lease, Liability	$ 1,980,970		$ 1,980,970
Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage			52.70%		68.10%
Customer Concentration Risk [Member] \| Revenue Benchmark [Member]
Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage			43.40%	46.80%
Supplier Concentration Risk [Member] \| Cost of Goods and Service, Product and Service Benchmark [Member]
Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage			32.80%	33.40%
Supplier Concentration Risk [Member] \| Accounts Payable [Member]
Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage			46.10%		32.10%
Share-based Payment Arrangement, Option [Member]
Significant Accounting Policies (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)			80,375
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in Dollars per share)			$ 0.82
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in Dollars per share)			$ 1.20
Proceeds from Stock Options Exercised			$ 79,828
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)			356,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)			$ 2.79