Note 15 - Subsequent Event (Details Textual) - USD ($)		9 Months Ended	12 Months Ended
	Apr. 17, 2017	Nov. 26, 2017	Feb. 26, 2017	Feb. 28, 2016	Mar. 01, 2015
Restructuring Charges			$ 313,000	$ 535,000	$ 1,179,000
Consolidation of Nelco Products Inc and Neltec Inc [Member] | Scenario, Forecast [Member]
Restructuring Charges, Duplicative Costs		$ 300,000
Consolidation of Nelco Products Inc and Neltec Inc [Member] | Minimum [Member] | Scenario, Forecast [Member]
Restructuring Charges		5,000
Consolidation of Nelco Products Inc and Neltec Inc [Member] | Maximum [Member] | Scenario, Forecast [Member]
Restructuring Charges		$ 5,500,000
Subsequent Event [Member] | Consolidation of Nelco Products Inc and Neltec Inc [Member] | Minimum [Member]
Restructuring and Related Costs, Expected Completion Period	120 days
Restructuring and Related Cost, Expected Pre-tax Benefit Per Year	$ 3,000,000
Subsequent Event [Member] | Consolidation of Nelco Products Inc and Neltec Inc [Member] | Maximum [Member]
Restructuring and Related Costs, Expected Completion Period	180 days
Restructuring and Related Cost, Expected Pre-tax Benefit Per Year	$ 3,500,000