Note 3 - Stock-Based Compensation (Details) - Restricted Stock Award (USD $)	6 Months Ended
	Jun. 30, 2013
Restricted Stock Award [Abstract]
Nonvested shares – December 31, 2012	113,458
Nonvested shares – December 31, 2012 (in Dollars per share)	$ 10.35	[1]
Granted	149,455
Granted (in Dollars per share)	$ 5.15	[1]
Forfeited	(19,899)
Forfeited (in Dollars per share)	$ 8.23	[1]
Vested	(19,435)
Vested (in Dollars per share)	$ 4.02	[1]
Nonvested shares – June 30, 2013	223,579
Nonvested shares – June 30, 2013 (in Dollars per share)	$ 7.61	[1]

[1] The shares were valued at the closing price of the Company's Common Stock on the dates of the awards.