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Buildings, Equipment, Furnishings and Leasehold Improvements - Equipment, furnishings and leasehold improvements (Details) - USD ($)	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Equipment, furnishings and leasehold improvements	$ 7,207,297	$ 6,660,049
Less: accumulated decpreciation	4,672,818	4,354,309
Equipment, furnishings and leasehold improvements, net	2,534,479	2,305,740
Depreciation Expense	324,381	382,777
Buildings
Equipment, furnishings and leasehold improvements	2,250,000	2,250,000
Laboratory Equipment
Equipment, furnishings and leasehold improvements	1,140,821	1,082,051
Machinery and Equipment
Equipment, furnishings and leasehold improvements	1,211,778	872,598
Leasehold improvements
Equipment, furnishings and leasehold improvements	473,560	413,529
Tradeshow and Demonstration Equipment
Equipment, furnishings and leasehold improvements	1,086,913	1,070,860
Furniture and Fixtures
Equipment, furnishings and leasehold improvements	$ 1,044,222	$ 971,011

X

- Definition

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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