Note 4 - Stock Benefit Plans (Detail) - Stock options activity: (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Outstanding at December 31, 2012	65
Outstanding at December 31, 2012 (in Dollars per share)	$ 30.93
Outstanding at March 31, 2013	65
Outstanding at March 31, 2013 (in Dollars per share)	$ 30.93
Outstanding at March 31, 2013	7 years 186 days
Outstanding at March 31, 2013 (in Dollars)	$ 4,647.50
Options vested and expected to vest at March 31, 2013	65
Options vested and expected to vest at March 31, 2013 (in Dollars per share)	$ 30.93
Options vested and expected to vest at March 31, 2013	7 years 186 days
Options vested and expected to vest at March 31, 2013 (in Dollars)	4,647.50
Options exerxcisable at March 31, 2013	49
Options exerxcisable at March 31, 2013 (in Dollars per share)	$ 31.81
Options exerxcisable at March 31, 2013	7 years 18 days
Options exerxcisable at March 31, 2013 (in Dollars)	$ 1,746.66