Note 18 - Commitments and Contingencies (Details Textual) - Redfield Site [Member] $ in Millions	9 Months Ended
	Nov. 02, 2019 USD ($)
Cumulative Environmental Remediation Expense	$ 30.9
Environmental Exit Costs, Assets Previously Disposed, Liability for Remediation	9.7
Reserve For Anticipated Future Remediation Activities For Off Site Remediation	5.1
Reserve For Anticipated Future Remediation Activities For On Site Remediation	$ 4.6
Accrual for Environmental Loss Contingencies, Discount Rate	4.80%
Accrual for Environmental Loss Contingencies, Gross, Total	$ 14.0
Accrual for Environmental Loss Contingencies, Undiscounted, Next Twelve Months	0.5
Accrual for Environmental Loss Contingencies, Undiscounted, Second Year	0.1
Accrual for Environmental Loss Contingencies, Undiscounted, Third Year	0.1
Accrual for Environmental Loss Contingencies, Undiscounted, Fourth Year	0.1
Accrual for Environmental Loss Contingencies, Undiscounted, Fifth Year	0.1
Accrual for Environmental Loss Contingencies, Undiscounted, after Fifth Year	13.1
Other Noncurrent Liabilities [Member]
Environmental Exit Costs, Assets Previously Disposed, Liability for Remediation	9.0
Accounts Payable and Accrued Liabilities [Member]
Environmental Exit Costs, Assets Previously Disposed, Liability for Remediation	$ 0.7