Note 1 - Basis of Presentation and Recent Accounting Pronouncements (Details Textual) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	May 12, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	May 20, 2019
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Cash And Cash Equivalents		$ 209		$ 233
Outstanding inter-company loans		416		408
Short-Term Intercompany Loans		117		110
Net increase (decrease) in cash, cash equivalents, restricted cash and cash in assets held for sale		(49)	$ (10)	23
Net cash (used in) provided by operating activities		$ (41)	$ (12)	12
Preferred stock, redemption date		Nov. 01, 2021
5.00% Secured Convertible Notes Due 2021 [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Secured convertible notes, interest rate		5.00%			5.00%
5.50% Series A Convertible Preferred Stock [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Secured convertible notes, interest rate		5.50%
Subsequent Event [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Inter-company transactions amount transferred	$ 70
United States [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Cash And Cash Equivalents		$ 62		72
Outside US [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Cash And Cash Equivalents		147		161
China [Member]
Basis Of Presentation And Recent Accounting Pronouncements [Line Items]
Cash And Cash Equivalents		$ 88		$ 89