Note 7 - Stock-Based Compensation (Detail) - Non-vested Stock Option Activity (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Non-Vested Stock Options Outstanding	1,914,000	1,902,000	1,902,000	2,856,125	3,051,125
Granted	70,000		60,000	110,000
Granted (in Dollars per share)	$ 1.72	$ 4.08	$ 4.08	$ 3.38
Non-Vested Stock Options [Member] | Beginning of Period [Member]
Non-Vested Stock Options Outstanding		183,938	183,938
Non-Vested Stock Options Weighted Average Grant Date Fair Value (in Dollars per share)		$ 5.56	$ 5.56
Non-Vested Stock Options [Member] | End of Period [Member]
Non-Vested Stock Options Outstanding	80,500
Non-Vested Stock Options Weighted Average Grant Date Fair Value (in Dollars per share)	$ 5.35
Non-Vested Stock Options [Member]
Granted	70,000
Granted (in Dollars per share)	$ 1.72
Vested	(172,688)
Vested (in Dollars per share)	$ 3.70
Forfeited	(750)
Forfeited (in Dollars per share)	$ 5.18
Beginning of Period [Member]
Non-Vested Stock Options Outstanding	1,902,000
End of Period [Member]
Non-Vested Stock Options Outstanding	1,914,000