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Significant Accounting Policies (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018	May 31, 2018
Significant Accounting Policies (Details) [Line Items]
Threshold Period Past Due for Write-off of Trade Accounts Receivable			90 days
Inventory Valuation Reserves	$ 50,000		$ 50,000		$ 52,000
Depreciation, Depletion and Amortization	22,436	$ 28,344	78,118	$ 87,479
Amortization of Intangible Assets	16,666	$ 17,387	$ 49,996	52,385
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)			109,500
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in Dollars per share)			$ 0.71
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in Dollars per share)			$ 1.04
Proceeds from Stock Options Exercised			$ 82,990	$ 18,614
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)			524,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)			$ 2.61
Revenue Recognition, Sales Returns, Reserve for Sales Returns	$ 0				0
Equity Method Investment, Ownership Percentage	6.00%		6.00%
Deferred Tax Assets, Valuation Allowance	$ 1,881,000		$ 1,881,000		$ 1,549,000
Share-based Payment Arrangement, Option [Member]
Significant Accounting Policies (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	393,865	597,645	592,080	569,915
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
Maximum [Member] | Marketing-Related Intangible Assets [Member]
Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			18 years
Maximum [Member] | Purchased Technology Rights [Member]
Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 years
Maximum [Member] | Patents [Member]
Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life			17 years
Credit Concentration Risk [Member] | Accounts Receivable [Member]
Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage			56.40%		53.30%
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage			46.80%	44.00%
Supplier Concentration Risk [Member] | Cost of Goods and Service, Product and Service Benchmark [Member]
Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage			33.40%	24.20%

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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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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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Amount of valuation reserve for inventory.

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

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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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