Quarterly report pursuant to Section 13 or 15(d)

Credit Facility - Additional Information (Detail)

v3.5.0.2
Credit Facility - Additional Information (Detail) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Line of Credit Facility [Line Items]    
Repayments of lines of credit $ 3,000,000  
Revolving Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Line of credit, maximum borrowing capacity   $ 5,000,000
Line of credit facility, amount outstanding 0  
Repayments of lines of credit $ 3,000,000  
Revolving Line of Credit [Member] | Prime Rate [Member]    
Line of Credit Facility [Line Items]    
Basis spread on variable interest rate   3.25%