Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities and Deferred Revenue - Additional Information (Detail)

v3.4.0.3
Accrued Liabilities and Deferred Revenue - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Payables And Accruals [Abstract]    
Deferred revenue recognized $ 126,000 $ 31,000