Note 6 - Stockholders' Equity and Equity Compensation (Detail) - Summary of Stock Option Activity (USD $)	6 Months Ended
Jun. 30, 2012
Outstanding at January 1, 2012	1,107,712
Outstanding at January 1, 2012 (in Dollars per share)	$ 18.98
Granted	267,880
Granted (in Dollars per share)	$ 18.11
Exercised	(25,123)
Exercised (in Dollars per share)	$ 14.04
Canceled/Expired	(106,332)
Canceled/Expired (in Dollars per share)	$ 23.66
Outstanding at June 30, 2012	1,244,137
Outstanding at June 30, 2012 (in Dollars per share)	$ 18.49
Exercisable at June 30, 2012	788,073
Exercisable at June 30, 2012 (in Dollars per share)	$ 16.91

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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