Note 3 - Taxation (Detail) - Summary of Unrecognized Tax Benefits (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Balance at beginning of period	$ 505	$ 664	$ 724
Increases in positions taken in a prior period	0	0
Decreases in positions taken in a prior period	0	0	0
Increases in positions taken in a current period	39	117	60
Decreases in positions taken in a current period	0	0	0
Decreases due to settlements	(202)	0	0
Decreases due to lapse of statute of limitations	(303)	(276)	(120)
Balance at end of period	$ 39	$ 505	$ 664