Credit Facility - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	$ 2,500,000
Credit Facility expiration date	Jan. 15, 2015
Credit Facility limit restricted to support letter of credit	225,000
Line of credit facility, remaining borrowing capacity	2,275,000
Line of Credit Facility, Maximum Borrowing Capacity in case of Not Compliance with Agreement	750,000
Prime Rate
Line of Credit Facility [Line Items]
Interest rate over prime rate	0.50%
December 31, 2014
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	$ 2,500,000