Buildings, Equipment, Furnishings and Leasehold Improvements - Equipment, furnishings and leasehold improvements (Details) - USD ($)	12 Months Ended
Feb. 28, 2021	Feb. 29, 2020
Equipment, furnishings and leasehold improvements	$ 8,134,753	$ 7,929,538
Less: accumulated decpreciation	(5,484,428)	(5,062,899)
Equipment, furnishings and leasehold improvements, net	2,650,325	2,866,639
Depreciation Expense	427,650	390,082
Buildings
Equipment, furnishings and leasehold improvements	2,250,000	2,250,000
Laboratory Equipment
Equipment, furnishings and leasehold improvements	1,399,826	1,418,903
Machinery and Equipment
Equipment, furnishings and leasehold improvements	1,548,415	1,400,419
Leasehold improvements
Equipment, furnishings and leasehold improvements	642,671	632,021
Tradeshow and Demonstration Equipment
Equipment, furnishings and leasehold improvements	1,137,346	1,139,693
Furniture and Fixtures
Equipment, furnishings and leasehold improvements	$ 1,156,495	$ 1,088,502

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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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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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