Note 10 - Leases (Details Textual) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
	Feb. 15, 2019	Jun. 30, 2019	Jun. 30, 2019
Operating Lease, Weighted Average Remaining Lease Term		4 years 3 months 18 days	4 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent		3.50%	3.50%
Operating Lease, Payments		$ 10.9	$ 20.5
Operating Lease, Expense		10.7	20.0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 16.5	$ 40.2
Cory 1st Choice Home Delivery [Member]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 16.0