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Segment Information (Details) - USD ($)
 3 Months Ended
May 31, 2017
May 31, 2016
Feb. 28, 2017
Net Sales $ 2,512,134 $ 2,240,211  
Rental Expense 39,098 43,117  
Interest Expense 12,213 13,745  
Net Income 15,869 55,791  
Assets 11,054,399   $ 10,735,936
Debt 1,139,213   $ 1,176,348
Ultrasonic Spraying      
Net Sales 2,500,734 2,216,211  
Rental Expense 49,074 49,074  
Depreciation Expense 84,106 96,619  
Net Income 55,779 88,653  
Assets 8,692,745 8,120,830  
Rental Real Estate Operations      
Net Sales 60,474 73,074  
Rental Operations Expense 21,396 24,923  
Depreciation Expense 17,702 18,194  
Interest Expense 12,213 13,745  
Net Income (39,910) (32,862)  
Assets 2,361,654 2,437,225  
Debt 1,139,213 1,284,230  
Eliminations      
Net Sales 49,074 49,074  
Rental Expense (49,074) (49,074)  
Consolidated      
Net Sales 2,512,134 2,240,211  
Rental Operations Expense 21,396 24,923  
Depreciation Expense 101,808 114,813  
Interest Expense 12,213 13,745  
Net Income 15,869 55,791  
Assets 11,054,399 10,558,055  
Debt $ 1,139,213 $ 1,284,230