Note 11 - Discontinued Operations - Restructuring Charges (Details) - Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] $ in Thousands	3 Months Ended
	May 31, 2020 USD ($)
Accrued, Beginning Balance	$ 432
Current Period Charges	20
Cash Payments	(251)
Non-Cash Charges
Accrued, Ending Balance	201
Total Costs Accrued to Date	5,543
Total Expected Costs	5,617
Facility Lease Costs [Member]
Accrued, Beginning Balance	432
Current Period Charges	13
Cash Payments	(244)
Non-Cash Charges
Accrued, Ending Balance	201
Total Costs Accrued to Date	2,942
Total Expected Costs	3,000
Employee Severance [Member]
Accrued, Beginning Balance
Current Period Charges
Cash Payments
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	1,081
Total Expected Costs	1,081
Equipment Removal [Member]
Accrued, Beginning Balance
Current Period Charges
Cash Payments
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	586
Total Expected Costs	586
Other Restructuring [Member]
Accrued, Beginning Balance
Current Period Charges	7
Cash Payments	(7)
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	934
Total Expected Costs	$ 950