Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets, valuation allowance	$ 6,507,000	$ 6,458,000
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	250,000,000	250,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	45,572,568	45,572,568
Common stock, shares outstanding (in shares)	45,572,568	45,572,568