Note 13 - Stockholder Rights Plan (Detail)	Dec. 31, 2012
Number of Preferred Stock Purchase Right Granted, per Common Share	1
Beneficial Ownership Threshold	15.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)	20.00
Percentage of Discount On Then-Current Market Value	50.00%
Redemption Rate, per Right (in Dollars per Item)	0.001
Expiration of Rights After Separation From Common Shares	3 years