Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Accounts Receivable and Concentration of Credit Risk (Details)

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Summary of Significant Accounting Policies - Accounts Receivable and Concentration of Credit Risk (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Accounts Receivable and Concentration of Credit Risk    
Reserve for accounts deemed uncollectible (as a percent) 100.00%  
Allowance for doubtful accounts reserve balance $ 192,000 $ 94,000
Minimum    
Accounts Receivable and Concentration of Credit Risk    
Age of doubtful accounts 60 days  
Age 61 to 90 Days    
Accounts Receivable and Concentration of Credit Risk    
Reserve for doubtful accounts (as a percent) 5.00%  
Age 61 to 90 Days | Minimum    
Accounts Receivable and Concentration of Credit Risk    
Age of doubtful accounts 61 days  
Age 61 to 90 Days | Maximum    
Accounts Receivable and Concentration of Credit Risk    
Age of doubtful accounts 90 days  
Age Over 90 Days    
Accounts Receivable and Concentration of Credit Risk    
Reserve for doubtful accounts (as a percent) 20.00%  
Age Over 90 Days | Minimum    
Accounts Receivable and Concentration of Credit Risk    
Age of doubtful accounts 90 days