Related-Party Transactions - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			12 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Secure Keyboards Ltd	Dec. 31, 2012 Secure Keyboards Ltd	Dec. 31, 2012 Secure Networks Ltd	Sep. 30, 2014 Settlement Agreement Maximum
Related Party Transaction [Line Items]
Percentage of ownership by a related party following acquisition					24.50%	30.00%	9.00%
Installment payment, contractual payment year								2020
Accretion of interest to related party liability	$ 100	$ 200	$ 432	$ 470