Note 11 - Leases - Reconciliation of Undiscounted Cash Flows to Operating and Finance Lease Liabilities (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Leases
2019	$ 4,139
2020	4,654
2021	4,716
2022	4,677
2023	4,699
2024+	26,138
Total undiscounted cash flows	49,023
Present values ("PV"):
Lease liabilities, current	3,014
Lease liabilities, non-current	33,099
Total PV of lease liabilities	36,113
Difference between undiscounted cash flows and discounted cash flows	12,910
Finance Leases
2019	1,126
2020	1,033
2021	596
2022	201
2023	43
Total undiscounted cash flows	2,999
Present values ("PV"):
Lease liabilities, current	1,136
Lease liabilities, non-current	803
Total PV of lease liabilities	1,939
Difference between undiscounted cash flows and discounted cash flows	$ 1,060