Related-Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended						3 Months Ended	12 Months Ended			3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013		Mar. 31, 2014 Hirsch	Dec. 31, 2013 Hirsch	Mar. 31, 2014 Secure Keyboards Ltd	Dec. 31, 2012 Secure Keyboards Ltd	Dec. 31, 2012 Secure Networks Ltd	Mar. 31, 2014 Settlement Agreement Maximum	Mar. 31, 2014 Related Party Transactions	Mar. 31, 2013 Related Party Transactions
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
Expense recognized for interest accreted on discounted liability	$ 146,000	$ 171,000									$ 100,000	$ 200,000
Outstanding liability to related party					6,600,000	6,700,000
Liability to related party	$ 1,056,000		$ 1,073,000	[1]	$ 1,100,000	$ 1,100,000

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2013 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.