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Segment Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Nov. 30, 2016
Nov. 30, 2015
Nov. 30, 2016
Nov. 30, 2015
Feb. 29, 2016
Net Sales $ 2,599,104 $ 3,032,457 $ 7,149,766 $ 8,890,027  
Rental Expense 36,007 42,447 117,578 120,779  
Interest Expense 12,848 14,331 39,960 44,395  
Net Income 62,342 243,565 28,460 541,176  
Assets 10,812,240   10,812,240   $ 10,669,537
Debt 1,212,692   1,212,692   $ 1,319,737
Ultrasonic Spraying          
Net Sales 2,574,954 3,008,458 7,077,318 8,819,278  
Rental Expense 49,074 49,074 147,223 147,223  
Depreciation Expense 109,491 108,477 311,354 286,907  
Interest Expense       75  
Net Income 87,047 271,220 113,550 635,526  
Assets 8,397,682 8,369,038 8,397,682 8,369,038  
Rental Real Estate Operations          
Net Sales 73,224 73,073 219,671 217,972  
Rental Expense 17,961 24,253 63,292 66,344  
Depreciation Expense 18,046 18,194 54,286 54,435  
Interest Expense 12,848 14,331 39,960 44,320  
Net Income (24,705) (27,655) (85,090) (94,350)  
Assets 2,414,558 2,464,560 2,414,558 2,464,560  
Debt 1,212,692 1,354,570 1,212,692 1,354,570  
Eliminations          
Net Sales 49,074 49,074 147,223 147,223  
Rental Expense (49,074) (49,074) (147,223) (147,223)  
Consolidated          
Net Sales 2,599,104 3,032,457 7,149,766 8,890,027  
Rental Expense 17,961 24,253 63,292 66,344  
Depreciation Expense 127,537 126,971 365,640 341,342  
Interest Expense 12,848 14,331 39,960 44,395  
Net Income 62,342 243,565 28,460 541,176  
Assets 10,812,240 10,833,598 10,812,240 10,833,598  
Debt $ 1,212,692 $ 1,354,570 $ 1,212,692 $ 1,354,570