Note 7 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating lease cost, gross	$ 1,709	$ 1,696
Sublease income	(1,283)	(1,270)
Net Operating lease cost	426	426
Cash paid under operating leases, gross	$ 2,492	$ 2,523
Weighted average remaining lease term - months (Month)	3 years 60 days
Weighted average discount rate	6.90%