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Segment information (Details) - USD ($)	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Net Sales	$ 9,724,553	$ 11,833,730
Rental Expense	160,440	158,629
Depreciation Expense	429,360	465,432
Interest Expense	52,294	58,447
Net Income (Loss)	95,706	547,729
Assets	10,735,936	10,669,537
Debt	1,176,348	1,319,737
Ultrasonic Spraying
Net Sales	9,634,956	11,738,982
Rental Expense	196,298	196,298
Depreciation Expense	354,896	392,803
Interest Expense		83
Net Income (Loss)	218,843	669,974
Assets	8,346,183	8,214,873
Debt
Rental Real Estate Operations
Net Sales	285,895	291,046
Rental Expense
Rental Operations Expense	85,976	85,887
Depreciation Expense	74,464	72,629
Interest Expense	52,294	58,364
Net Income (Loss)	(123,137)	(122,245)
Assets	2,389,753	2,454,664
Debt	1,176,348	1,319,737
Eliminations
Net Sales	196,298	196,298
Rental Expense	(196,298)	(196,298)
Consolidated
Net Sales	9,724,553	11,833,730
Rental Expense
Rental Operations Expense	85,976	85,887
Depreciation Expense	429,360	465,432
Interest Expense	52,294	58,447
Net Income (Loss)	95,706	547,729
Assets	10,735,936	10,669,537
Debt	$ 1,176,348	$ 1,319,737

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