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Stock Repurchase Program (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended 104 Months Ended
Nov. 06, 2014
Aug. 31, 2012
Mar. 31, 2020
Mar. 31, 2020
Aug. 09, 2012
Aug. 31, 2011
Stock Repurchase Program            
Number of shares acquired       3,422,000    
Value of common stock repurchased       $ 5.6    
Average price per share of common stock repurchased (in dollars per share)     $ 1.63      
August 2011 Program            
Stock Repurchase Program            
Number of shares acquired   964,000        
Value of common stock repurchased   $ 1.3        
August 2011 Program | Maximum            
Stock Repurchase Program            
Value of common stock approved under stock repurchase program           $ 3.0
August 2012 Program            
Stock Repurchase Program            
Value of remaining funds cancelled under initial stock repurchase program         $ 1.7  
Increase in the authorized amount for repurchase of common stock $ 3.0          
Value of common stock available for repurchase under current program     $ 1.7 $ 1.7    
August 2012 Program | Maximum            
Stock Repurchase Program            
Value of common stock approved under stock repurchase program         $ 3.0