Note 9 - Operating Segments (Details Textual)	3 Months Ended								12 Months Ended
	Feb. 28, 2017 USD ($)	Nov. 30, 2016 USD ($)	Aug. 31, 2016 USD ($)	May 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Nov. 30, 2015 USD ($)	Aug. 31, 2015 USD ($)	May 31, 2015 USD ($)	Feb. 28, 2017 USD ($)	Feb. 29, 2016 USD ($)	Feb. 28, 2015 USD ($)
Number of Reportable Segments									5
Revenues	$ 10,362,977	$ 9,955,239	$ 8,601,962	$ 9,376,199	$ 11,011,006	$ 9,807,313	$ 9,274,554	$ 10,364,022	$ 38,296,377	$ 40,456,895	$ 41,508,376
Manufacturing [Member]
Revenues									$ 25,423,844	26,355,759	$ 25,894,835
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Number of Major Customers									1
Revenues									$ 4,100,000
Concentration Risk, Percentage									11.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Manufacturing [Member]
Number of Major Customers									1
Revenues									$ 4,100,000	$ 5,200,000
Concentration Risk, Percentage									10.60%	12.80%