Note 8 - Debt, Credit Facility and Leases - Future Payments of Long-term Debt and Finance and Operating Leases (Details) $ in Thousands	Sep. 30, 2021 USD ($)
2022, finance leases	$ 6,336
2022, operating leases	3,166
2023, finance leases	4,590
2023, operating leases	2,590
2024, finance leases	3,313
2024, operating leases	1,037
2025, finance leases	855
2025, operating leases	533
2026, finance leases	0
2026, operating leases	524
Thereafter, finance leases	0
Thereafter, operating leases	1,953
Total, finance leases	15,094
Total, operating leases	9,803
Senior Notes [Member] | The 2028 Senior Notes [Member]
2022	34,438
2023	34,438
2024	34,438
2025	34,438
2026	34,438
Thereafter	522,349
Total	694,539
Senior Notes [Member] | IQ Notes [Member]
2022	2,467
2023	2,467
2024	2,467
2025	2,467
2026	37,301
Thereafter	0
Total	$ 47,169