Note 15 - Commitments and Contingencies - Future Minimum Payments Required Under the License Agreements (Details) $ in Thousands	Dec. 31, 2016 USD ($)
2017	$ 1,518
2017	4,189
2017	5,707
2018	1,512
2018	447
2018	1,959
2019	1,506
2019
2019	1,506
2020	25
2020
2020	25
2021
2021
2021
License agreements, future minimum payments due thereafter
Purchase obligations, future minimum payments due thereafter
License agreements and purchase obligations, future minimum payments due thereafter
License agreements, future minimum payments due	4,561
Purchase obligations, future minimum payments due	4,636
License agreements and purchase obligations, future minimum payments due	$ 9,197