Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Other Liabilities, Current [Abstract]
Accrued legal	$ 651	$ 1,065
Accrued services	204	518
Income taxes payable	166	69
Other current liabilities	618	573
Total other current liabilities	$ 1,639	$ 2,225