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Stockholders’ Equity and Stock Repurchase Program (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Oct. 27, 2014
Feb. 21, 2013
Stock Repurchase Program [Abstract]          
Stock repurchase program, authorized amount       $ 5,000,000 $ 6,000,000
Shares repurchased (in shares) 908,000 0 285,000    
Average price of shares repurchased (in dollars per share) $ 2.52   $ 2.51    
Total purchase price $ 2,300,000   $ 716,000    
Stock repurchase program remaining authorized repurchase amount $ 2,700,000   $ 5,300,000    
Series A Preferred Stock          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Preferred stock, shares issued (in shares) 883,000 883,000      
Cumulative annual dividend rate (as a percent) 5.00% 5.00%      
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001      
Preferred stock, shares outstanding (in shares) 883,000 883,000      
Preferred stock, value $ 3,532,000 $ 3,532,000      
Liquidation preference over common stock (in dollars per share) $ 4 $ 4