Note 13 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

Assets	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Money market mutual funds	$	25,351	$	25,351	$	—	$	—
Auction-rate securities		784		—		—		784
Total	$	26,135	$	25,351	$	—	$	784

Assets	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Money market mutual funds	$	25,339	$	25,339	$	—	$	—
Auction-rate securities		784		—		—		784
Total	$	26,123	$	25,339	$	—	$	784