Note 5 - Debt and Finance Leases and Related Maturities and Interest Rates (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Carrying Value	$ 251	$ 19
Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	2	2
Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	$ 249	17
RED-Rochester, LLC [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2033
Weighted-Average Effective Interest Rate	11.46%
Carrying Value	$ 1	1
RED-Rochester, LLC [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2033
Weighted-Average Effective Interest Rate	11.46%
Carrying Value	$ 12	12
Finance leases [Member] | Current Portion, Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	1	1
Finance leases [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	$ 3	3
Term Note [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2026
Weighted-Average Effective Interest Rate	13.91%
Carrying Value	$ 219
Convertible Debt [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Maturity	2026
Weighted-Average Effective Interest Rate	17.28%
Carrying Value	$ 14
Other Debt [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Carrying Value	$ 1	$ 2