Note 8 - Leases (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Jan. 01, 2020 USD ($)	Jan. 01, 2019 USD ($)
Operating Lease, Right-of-Use Asset	$ 25,799		$ 30,100
Operating Lease, Liability, Total	$ 25,899		$ 30,100
Subsequent Event [Member]
Operating Lease, Right-of-Use Asset		$ 3,800
Operating Lease, Liability, Total		$ 3,800
Cleveland Warehouse [Member]
Lessee, Operating Lease, Renewal Term	5 years
Operating Lease, Annual Expense	$ 200
Lessee, Operating Lease, Number of Renewal Term	3
Minimum [Member]
Lessee Operating Lease, Remaining Lease Term	1 year
Maximum [Member]
Lessee Operating Lease, Remaining Lease Term	19 years
Lessee, Operating Lease, Renewal Term	5 years