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% | |||||||||