Other Long-Term Assets - Other Long-Term Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Assets Noncurrent Disclosure [Abstract]
Deferred costs	$ 900	$ 1,300
Prepaid commissions	1,200	1,700
Deferred tax asset	100	100
Other	300	400
Total	$ 2,467	$ 3,495