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Debt - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 22, 2016
Sep. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Line Of Credit Facility [Line Items]            
Repayments of line of credit         $ 19,500,000 $ 5,000,000
Interest expense   $ 195,000   $ 160,000 506,000 $ 405,000
Reclassification of deferred financing costs, net     $ 48,000      
Western Alliance Bank            
Line Of Credit Facility [Line Items]            
Repayment of term loan $ 5,100,000          
Repayment of full principal amount 5,000,000          
Repayment of accrued interest 100,000          
Repayments of line of credit 5,800,000          
Line of credit, outstanding amount   $ 0     $ 0  
Interest expense $ 100,000