Note 4 - Investment In Global (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Aug. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jul. 31, 2011
Available For Sale Securities Ownership Percentage		34.00%	33.88%	33.88%	33.25%
Available For Sale Securities Shares Purchased (in Shares)	233	230
Payments to Acquire Available-for-sale Securities, Equity (in Dollars)	$ 266	$ 411	$ 266
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax (in Dollars)		857	(6)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax (in Dollars)		$ 2,426	$ (482)
Percentage Ownership of Global Shares, Ending [Member]
Available For Sale Securities Ownership Percentage			34.22%