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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

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