v2.4.0.6
Note 12 - Stockholders' Equity (Detail) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Oct. 31, 2011
Warrants Granted To Consultant [Member]
Dec. 31, 2012
Warrants Granted To Consultant [Member]
Dec. 31, 2011
Warrants Granted To Consultant [Member]
Dec. 31, 2012
Stock Options [Member]
Maximum [Member]
Dec. 31, 2012
Stock Options [Member]
Dec. 31, 2011
Stock Options [Member]
Dec. 31, 2010
Stock Options [Member]
Dec. 31, 2012
Restricted Stock and Deferred Stock Unit Awards [Member]
Maximum [Member]
Dec. 31, 2012
Restricted Stock and Deferred Stock Unit Awards [Member]
Dec. 31, 2011
Restricted Stock and Deferred Stock Unit Awards [Member]
Dec. 31, 2010
Restricted Stock and Deferred Stock Unit Awards [Member]
Oct. 31, 2011
Warrants Granted To Consultant [Member]
Sep. 07, 2011
September 2011 Securities Purchase Agreement [Member]
Dec. 31, 2011
2011 Registration Rights and Warrants Issuance [Member]
Common Stock, Shares Authorized (in Shares) 50,000,000 50,000,000                              
Common Stock, Par or Stated Value Per Share (in Dollars per share) $ 0.01 $ 0.01                              
Preferred Stock, Shares Authorized (in Shares) 1,000,000                                
Preferred Stock, Par or Stated Value Per Share (in Dollars per share) $ 0.01                                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)                             150,000    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       6 months     4 years                    
Warrants Issued, Term                             10 years   5 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in Dollars per share)       $ 2.00                          
Allocated Share-based Compensation Expense $ 1,907,000 $ 1,062,000 $ 634,000   $ 200,000 $ 100,000   $ 1,895,000 $ 1,058,000 $ 611,000   $ 12,000 $ 4,000 $ 23,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period (in Shares) 1,199,685                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value 1,971,000                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 7 years                                
Proceeds from Stock Options Exercised   33,000                              
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options 2,274,000                                
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition               3 years     1 year            
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized                       15,000          
Stock Issued During Period, Shares, New Issues (in Shares)   3,666,665                           3,666,665  
Stock Issued During Period, Value, New Issues   6,418,000 10,020,000                         6,600,000  
Equity Issuance, Per Share Amount (in Dollars per share)                               $ 1.80  
Proceeds From Issuance Of Common Stock, Net Of Issuance Costs                               6,418,000  
Payments of Stock Issuance Costs                               $ 182,000  
Warrant Issuance, Percent of Fully Diluted Outstanding Shares of Common Stock To Be Granted For Each Full 30-Day Period Following the Filing Deadline or The Required Effectiveness Deadline                                 1.00%
Warrant Issuance, Max Aggregate Percent of Fully Diluted Outstanding Shares of Common Stock                                 10.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)                                 1.80