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Stock Repurchase Program (Details) - USD ($)
$ / shares in Units, $ in Millions
98 Months Ended
Nov. 06, 2014
Sep. 30, 2019
Aug. 09, 2012
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  
Value of common stock available for repurchase under current program   $ 1.7  
August 2012 Program      
Stock Repurchase Program      
Increase in the authorized amount for repurchase of common stock $ 3.0    
August 2012 Program | Maximum      
Stock Repurchase Program      
Value of common stock approved under stock repurchase program     $ 3.0