Line of Credit - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Total availability under line of credit agreement	$ 10,000,000
Letters of credit outstanding amount	600,000
Available borrowing under letter of credit	9,400,000
Varying Interest on Line of credit agreement	LIBOR plus 1.5% to prime
Line of credit interest rate	1.50%
Maturity date of line of credit	Jun. 30, 2015
Line of credit facility amount outstanding	$ 0	$ 0
Maximum ratio of total liabilities to tangible net worth	1
Minimum required fixed coverage charge ratio	1.25
Period used for calculating ratios	12 months
Company's tangible net worth ratio	0.34
Fixed coverage charge ratio	3.26