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Stock Repurchase Program (Details) - USD ($)
$ / shares in Units, $ in Millions
83 Months Ended
Nov. 06, 2014
Jun. 30, 2018
Jun. 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