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Stockholders' Equity (Narrative) (Detail) (USD $)
 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Sep. 30, 2011
Mar. 31, 2011
Sep. 24, 2008
Jun. 27, 2008
Jun. 29, 2007
Mar. 31, 2004
Oct. 31, 2003
Dec. 31, 2002
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2008
Common Stock Warrants [Member]
Jun. 30, 2012
Common Stock Warrants [Member]
Jun. 30, 2011
Common Stock Warrants [Member]
Jun. 30, 2010
Common Stock Warrants [Member]
Sep. 30, 2011
2005 Management Stock Option Plan [Member]
Nov. 30, 2007
2005 Management Stock Option Plan [Member]
Jun. 30, 2012
2005 Management Stock Option Plan [Member]
Jun. 30, 2011
2005 Management Stock Option Plan [Member]
Jun. 30, 2010
2005 Management Stock Option Plan [Member]
Sep. 30, 2011
2005 Stock Incentive Plan [Member]
Feb. 28, 2009
2005 Stock Incentive Plan [Member]
Jun. 30, 2012
2005 Stock Incentive Plan [Member]
Jun. 30, 2011
2005 Stock Incentive Plan [Member]
Jun. 30, 2010
2005 Stock Incentive Plan [Member]
Jun. 30, 2012
2000 Non-Management Stock Option Plan [Member]
Jun. 30, 2011
2000 Non-Management Stock Option Plan [Member]
Jun. 30, 2010
2000 Non-Management Stock Option Plan [Member]
Jun. 30, 2012
1998 Stock Plan [Member]
Jun. 30, 2011
1998 Stock Plan [Member]
Jun. 30, 2010
1998 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                              
Preferred stock, authorized                 5,000,000                                            
Preferred stock par value per share                 $ 0.001                                            
Preferred stock, outstanding                 0                                            
Warrants to purchase shares of common stock 238,393 1,218,493 1,525,515 73,889 333,333 312,500 128,766 236,742                                              
Warrants exercise price     $ 0.95 $ 0.90 $ 1.20 $ 2.00 $ 3.88 $ 2.11                                              
Fair value of warrants expected life     3 years 3 years         4 years 5 months 23 days 4 years 6 months 6 years 3 months                                        
Expected stock price volatility     80.00% 80.00%         85.00% 82.00% 80.00%                                        
Risk free interest rate     2.26% 3.14%         0.97% 1.82% 2.76%                                        
Dividend yield     0.00% 0.00%                                                         
Fair value assigned to the warrant                       $ 168,000                                      
Amortization period of warrants     3 years                 2 years                                      
Warrants expense                         0 0 84,000                                
Discount on note related to relative value of warrants issued     272,000,000           588,000 1,251,000 1,027,000                                        
Warrants exercised 307,022 1,218,493                                                          
Issuance of common stock due to exercise of warrants 238,393                                                            
Increased in shares                               500,000 500,000       1,000,000 1,000,000                  
Option granted at price not less than percentage of fair market value of the common stock on the date of grant                                   100.00%               85.00%     85.00%    
Right of repurchase, lapse rate with respect to shares granted                                   0.208%                          
Exercisable period from the date of grant                                   10                          
Option vest, minimum years                                             4 years     4 years     4 years    
Option vest, maximum years                                             10 years     10 years     10 years    
Plan expired                                                   July 2010     November 2010    
Closing stock price                 $ 5.45                                            
Total intrinsic value of the options exercised during the period                 690,511 1,030,788 6,162                                        
Options granted during period                 720,300 280,450 1,121,700             340,000 115,000 120,000     380,300 165,450 941,100   (25,953) 56,000   (39,216) 4,600
Options granted during period, weighted average price                 $ 3.21 $ 1.21 $ 0.54             $ 4.56 $ 1.97 $ 0.82     $ 5.53 $ 1.89 $ 0.76   $ 0.90 $ 0.71   $ 0.73 $ 0.49
Option granted but not yet vested                 $ 1,500,000                                            
Expected to be recognized                 1 year 4 months 2 days