Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Related Party Transaction [Line Items]
Lease expiration date			Jul. 31, 2016
Annual lease, rate	$ 69,000	$ 69,000	$ 138,000	$ 208,000
Debt instrument, Face amount	775,000		775,000
Debt instrument, Interest rate, Stated percentage	4.00%		4.00%
Debt instrument, Periodic payment, interest	8,000		24,000
Debt instrument, Periodic payment, Principal	$ 25,000		$ 175,000
Equity method investment, Ownership percentage	50.00%		50.00%