Liquidity - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Liquidity And Managements Plans [Abstract]
Cash and cash equivalents	$ 83,560	$ 70,472	$ 23,176	$ 63,189
Cash from operations	(3,732)	(28,833)	(60,102)
Stockholders' equity	$ 31,696	$ 54,396	$ (812)	$ 49,778