Quarterly report pursuant to Section 13 or 15(d)

Credit Facility - Additional Information (Detail)

v3.4.0.3
Credit Facility - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Line of Credit Facility [Line Items]    
Repayments of lines of credit $ 2,000,000  
Revolving Line of Credit    
Line of Credit Facility [Line Items]    
Line of credit, maximum borrowing capacity   $ 5,500,000
Line of credit facility, amount outstanding 0  
Repayments of lines of credit $ 2,000,000  
Revolving Line of Credit | Prime Rate    
Line of Credit Facility [Line Items]    
Basis spread on variable interest rate   3.25%