Note 17 - Commitments and Contingencies - Future Minimum Payments Required Under the License Agreements (Details) $ in Thousands	Dec. 31, 2019 USD ($)
License agreements, future minimum payments due in 2020	$ 56
Purchase obligations, future minimum payments due in 2020	7,669
License agreements and purchase obligations, future minimum payments due in 2020	7,725
License agreements, future minimum payments due in 2021	56
Purchase obligations, future minimum payments due in 2021	1,200
License agreements and purchase obligations, future minimum payments due in 2021	1,256
License agreements, future minimum payments due in 2022	56
Purchase obligations, future minimum payments due in 2022	370
License agreements and purchase obligations, future minimum payments due in 2022	426
License agreements, future minimum payments due in 2023	56
Purchase obligations, future minimum payments due in 2023	370
License agreements and purchase obligations, future minimum payments due in 2023	426
License agreements, future minimum payments due in 2024	56
Purchase obligations, future minimum payments due in 2024
License agreements and purchase obligations, future minimum payments due in 2024	56
License agreements, future minimum payments due thereafter	617
Purchase obligations, future minimum payments due thereafter
License agreements and purchase obligations, future minimum payments due thereafter	617
License agreements, future minimum payments due	897
Purchase obligations, future minimum payments due	9,609
License agreements and purchase obligations, future minimum payments due	$ 10,506