Long-term Investment - Additional Information (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Investment [Line Items]
Investment in available-for-sale equity security	$ 31,000	$ 37,000
Cost basis in our available-for-sale security	19,000	19,000
Unrealized gains in accumulated other comprehensive income	$ 12,000	$ 18,000