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Note 7 - Stockholder's Equity (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Nov. 30, 2011
USD ($)
$ / shares
shares
Jun. 30, 2011
shares
Nov. 30, 2009
shares
Sep. 30, 2015
USD ($)
$ / shares
shares
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
$ / shares
shares
Sep. 30, 2014
USD ($)
Dec. 31, 2014
$ / shares
shares
Dec. 31, 2008
shares
Aug. 11, 2014
shares
Jun. 27, 2007
shares
2006 Stock Incentive Plan [Member]                      
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, Exercises in Period           12,500          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                     3,700,000
2012 Omnibus Incentive Plan [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period           333          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                   8,700,000  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant       3,800,000   3,800,000          
Amended and Restated 2006 Stock Incentive Plan [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                   2,100,000  
Series A Preferred Stock [Member]                      
Preferred Stock, Shares Issued 1,000,000                    
Proceeds from Issuance of Preferred Stock and Preference Stock | $ $ 5,000,000                    
Convertible Preferred Stock, Shares Issued upon Conversion 1,479,949                    
Preferred Stock, Redemption Price Per Share | $ / shares $ 3.38                    
Restricted Stock [Member] | End of One Year [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage           33.00%          
Restricted Stock [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           3 years          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period           1,277,350          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period           3 years          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Number of Annual Increments           3          
Allocated Share-based Compensation Expense | $           $ 1,100,000          
Employee Stock Option [Member]                      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition           2 years          
Warrant Exercised           0          
Common Stock, Par or Stated Value Per Share | $ / shares       $ 0.001   $ 0.001   $ 0.001      
Common Stock, Shares Authorized       100,000,000   100,000,000   100,000,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period           12,833   38,834      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $       $ 5,000,000   $ 5,000,000          
Allocated Share-based Compensation Expense | $       $ 661,426 $ 1,043,083 $ 2,009,742 $ 3,022,471