XML 24 R57.htm IDEA: XBRL DOCUMENT v2.4.0.8
Revolving Credit Facility - Additional Information (Detail) (USD $)
0 Months Ended
Nov. 04, 2013
Mar. 31, 2014
Line of Credit Facility [Line Items]    
Credit facility initiation date Nov. 04, 2013  
Revolving credit facility amount $ 20,000,000  
Credit facility fee percentage 0.20%  
Line of Credit Facility, Expiration Period 3 years  
Debt Outstanding   $ 0
Minimum [Member]
   
Line of Credit Facility [Line Items]    
Credit facility interest rate 1.375%  
Maximum [Member]
   
Line of Credit Facility [Line Items]    
Credit facility interest rate 2.00%