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Buildings, Equipment, Furnishings and Leasehold Improvements - Equipment, furnishings and leasehold improvements (Details) (USD $)
12 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Equipment, furnishings and leasehold improvements $ 5,350,198 $ 5,002,986
Less: accumulated decpreciation (2,496,421) (2,156,136)
Equipment, furnishings and leasehold improvements, net 2,853,777 2,846,850
Depreciation Expense 340,286 321,577
Buildings
   
Equipment, furnishings and leasehold improvements 2,344,403 2,296,606
Laboratory Equipment
   
Equipment, furnishings and leasehold improvements 651,562 526,388
Machinery
   
Equipment, furnishings and leasehold improvements 639,102 613,946
Leasehold
   
Equipment, furnishings and leasehold improvements 152,161 152,161
Tradeshow and Demonstration Equipment
   
Equipment, furnishings and leasehold improvements 908,819 772,313
Furniture
   
Equipment, furnishings and leasehold improvements $ 654,151 $ 641,572