Note 10 - Leases - Future Minimum Amounts Due Under Subleases (Details) $ in Thousands	Mar. 31, 2019 USD ($)
2019 (excluding the three months ended March 31, 2019), subleases	$ 1,689
2020, subleases	1,768
2021, subleases	1,105
2022, subleases	616
Total amounts due under subleases	$ 5,178