Buildings, equipment, furnishings and leasehold improvements (Details) - USD ($)	Feb. 28, 2025	Feb. 29, 2024
Property, Plant and Equipment [Line Items]
Totals	$ 10,191,393	$ 9,722,595
Less: Accumulated depreciation	(7,580,793)	(6,890,439)
Equipment, furnishings and leasehold improvements, net	2,610,600	2,832,156
Building [Member]
Property, Plant and Equipment [Line Items]
Totals	2,250,000	2,250,000
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Totals	1,843,945	1,733,911
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Totals	1,921,722	1,891,345
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Totals	1,048,328	924,356
Tradeshow And Demonstration Equipment [Member]
Property, Plant and Equipment [Line Items]
Totals	1,249,850	1,151,899
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Totals	$ 1,877,548	$ 1,771,084

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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