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Basis of Presentation - Additional Information (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
USD ($)
Customer
Sep. 30, 2015
Customer
Sep. 30, 2016
USD ($)
Customer
Sep. 30, 2015
Customer
Dec. 31, 2015
USD ($)
Customer
Significant Accounting Policies [Line Items]          
Prior Period Reclassification Adjustment     $ 0    
Accumulated deficit $ 109,932,963   109,932,963   $ 89,566,494
Available cash, cash equivalents and investments in short term available-for-sale securities, amount 16,600,000   16,600,000    
Current liabilities 9,801,121   9,801,121   6,319,610
Long-term liabilities $ 6,902,379   $ 6,902,379   $ 7,737,586
Sales Revenue, Net | Customer Concentration Risk          
Significant Accounting Policies [Line Items]          
Number of customers | Customer 3 3 3 3  
Sales Revenue, Net | Customer Concentration Risk | Customer One          
Significant Accounting Policies [Line Items]          
Sales revenue percentage 27.00% 26.00% 38.00% 29.00%  
Sales Revenue, Net | Customer Concentration Risk | Customer Two          
Significant Accounting Policies [Line Items]          
Sales revenue percentage 24.00% 16.00% 14.00% 10.00%  
Sales Revenue, Net | Customer Concentration Risk | Customer Three          
Significant Accounting Policies [Line Items]          
Sales revenue percentage 9.00% 12.00% 7.00% 6.00%  
Accounts Receivable | Customer Concentration Risk          
Significant Accounting Policies [Line Items]          
Number of customers | Customer     2   2
Accounts Receivable | Customer Concentration Risk | Customer One          
Significant Accounting Policies [Line Items]          
Sales revenue percentage     59.00%   32.00%
Accounts Receivable | Customer Concentration Risk | Customer Two          
Significant Accounting Policies [Line Items]          
Sales revenue percentage     11.00%   25.00%
Growth Term Loan          
Significant Accounting Policies [Line Items]          
Long-term liabilities $ 6,900,000   $ 6,900,000    
Deferred financing costs $ 31,067   $ 31,067   $ 52,377