XML 126 R110.htm IDEA: XBRL DOCUMENT v3.8.0.1
Other Borrowings - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Oct. 12, 2017
Jul. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Apr. 30, 2017
Oct. 13, 2016
Line Of Credit Facility [Line Items]            
Line of credit facility, amount       $ 20,650,000    
Repayment of lines of credit   $ 16,200,000 $ 20,650,000 9,350,000    
Short-term credit lines available for use, outstanding     $ 0 $ 0    
Ridgestone | CIBC Bank USA | Credit agreement            
Line Of Credit Facility [Line Items]            
Line of credit facility, amount           $ 30,000,000
Line of credit facility, commitment fee payable           $ 300,000
Line of credit facility, maturity date     Oct. 12, 2017      
Line of credit facility, interest rate       3.75%    
Ridgestone | CIBC Bank USA | Amended Credit Agreement            
Line Of Credit Facility [Line Items]            
Line of credit facility, revolving credit conversion to non-revolving line of credit, description     In April 2017, the revolving line of credit was amended to a non-revolving line of credit as long as the outstanding balance exceeds $5.0 million.      
Line of credit facility, revolving credit conversion to non-revolving line of credit, threshold amount         $ 5,000,000  
Threshold amount for conversion of line of credit into revolving line of credit         5,000,000  
Revolving line of credit facility, maximum borrowing capacity         $ 5,000,000  
Line of credit facility, extended maturity date Oct. 11, 2018          
Line of credit facility, interest rate terms The amended revolving line of credit bears interest at either the London Interbank Offered Rate (“LIBOR”) Rate plus 250 basis points or the Prime Rate minus 25 basis points, based on the Company’s election, which is required to be communicated to CIBC at least three business days prior to the commencement of an interest period. If the Company fails to provide timely notification, the interest rate will be Prime Rate minus 25 basis points. As of December 31, 2017, the line of credit has not been drawn upon, so an interest rate option has not been selected.          
Ridgestone | CIBC Bank USA | Amended Credit Agreement | LIBOR Rate            
Line Of Credit Facility [Line Items]            
Interest rate spread 2.50%          
Ridgestone | CIBC Bank USA | Amended Credit Agreement | Prime Rate            
Line Of Credit Facility [Line Items]            
Interest rate spread 0.25%