Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Change in Company's recorded goodwill	$ 0	$ 0	$ 0	$ 0
Amortization expense of intangible assets	101	241	310	723
Expiration of amortization			Between 2012 and 2016
Amortization from capitalized software development costs	$ 77	$ 53	$ 258	$ 95