Note 13 - Restructuring, Impairment and Other Costs - Restructuring and Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accrued balance			$ 770
Costs incurred			(639)
Payments			(131)
Expenses/charges
Accrued balance
Employee Severance [Member]
Accrued balance
Costs incurred
Payments
Expenses/charges
Accrued balance
Executive Severance [Member]
Accrued balance			35
Costs incurred		$ 82	711	$ 899
Payments			(318)
Expenses/charges
Accrued balance	428		428
Facility Closing [Member]
Accrued balance			770
Costs incurred			(639)
Payments			(131)
Expenses/charges
Accrued balance