Note 6 - Stockholders' Equity (Detail) - The following is a summary of option award activity under the Plan: (USD $)	12 Months Ended
	Dec. 31, 2012
December 31, 2011	4,117,979
December 31, 2011 (in Dollars per share)	$ 5.21
December 31, 2011	356,100
December 31, 2011	3.38
December 31, 2012	5,016,916
December 31, 2012 (in Dollars per share)	$ 4.54
December 31, 2012	404,500
December 31, 2012	2.30
Granted	1,132,383
Granted (in Dollars per share)	$ 1.89
Granted	1,132,383
Granted (in Dollars per share)	$ 1.32
Vested	(960,233)
Vested (in Dollars per share)	$ 1.61
Exercised	(1,250)
Exercised (in Dollars per share)	$ 1.90
Forfeited, Canceled	(232,196)
Forfeited, Canceled (in Dollars per share)	$ 3.49
Forfeited, Canceled	(123,750)
Forfeited, Canceled (in Dollars per share)	$ 1.73