Note 10 - Leases (Details Textual) - USD ($) $ in Millions		3 Months Ended
	Feb. 15, 2019	Mar. 31, 2019
Operating Lease, Weighted Average Remaining Lease Term		4 years 146 days
Operating Lease, Weighted Average Discount Rate, Percent		3.50%
Operating Lease, Payments		$ 9.6
Operating Lease, Expense		9.4
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 23.7
Cory 1st Choice Home Delivery [Member]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 16.0