Note 13 - Stock-Based Compensation (Details) (USD $)	1 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended								1 Months Ended			9 Months Ended		12 Months Ended
	Apr. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2006	Sep. 30, 2013 RSA [Member]	Sep. 30, 2012 RSA [Member]	Sep. 30, 2013 RSA [Member]	Sep. 30, 2012 RSA [Member]	Sep. 30, 2013 Consultant Compensation [Member] 2006 Stock Incentive Plan [Member]	Dec. 31, 2012 Consultant Compensation [Member] 2006 Stock Incentive Plan [Member]	Sep. 30, 2013 2012 Omnibus Incentive Plan [Member]	May 31, 2012 2012 Omnibus Incentive Plan [Member]	Dec. 31, 2011 2012 Omnibus Incentive Plan [Member]	May 31, 2012 Amended and Restated 2006 Stock Incentive Plan [Member]	Nov. 30, 2011 2006 Stock Incentive Plan [Member]	Jun. 30, 2011 2006 Stock Incentive Plan [Member]	Nov. 30, 2009 2006 Stock Incentive Plan [Member]	Sep. 30, 2013 2006 Stock Incentive Plan [Member]		Dec. 31, 2008 2006 Stock Incentive Plan [Member]	Dec. 31, 2012 2006 Stock Incentive Plan [Member]		Jun. 27, 2007 2006 Stock Incentive Plan [Member]
Note 13 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)		$ 3,700,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options (in Dollars)		2,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized				200,000								5,700,000		2,100,000									3,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant											6,100,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross					150,000	0	1,458,000	0
Allocated Share-based Compensation Expense (in Dollars)					198,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized															4,000,000	4,000,000	2,000,000			2,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number									115,531	135,531	1,057,875		187,375					7,479,783	[1]		8,452,340	[2]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)									$ 4.08	$ 3.62	$ 2.01		$ 2.86					$ 2.38	[1]		$ 2.56	[2]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period									20,000									122,685	[3]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in Dollars per share)									$ 1.00									$ 1.00	[3]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number									71,352		106,375							5,968,883	[4]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in Dollars per share)									$ 3.64		$ 2.86							$ 1.95	[4]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value (in Dollars)		$ 116,000	$ 412,000

[1] Includes 115,531 options granted to purchase common stock at a weighted average exercise price of $4.08 per share being held by consultants.

[2] Includes 135,531 outstanding options to purchase common stock at a weighted average exercise price of $3.62 per share being held by consultants.

[3] Includes 20,000 outstanding options to purchase common stock at a weighted average exercise price of $1.00 per share being held by consultants.

[4] Includes 71,352 exercisable options to purchase common stock at a weighted average exercise price of $3.64 per share being held by consultants.