Related-Party Transactions - Additional Information (Detail)	9 Months Ended							9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)		Dec. 31, 2012 USD ($)		Sep. 30, 2013 Hirsch Electronics USD ($)	Dec. 31, 2012 Hirsch Electronics USD ($)	Sep. 30, 2013 Secure Keyboards Ltd	Sep. 30, 2013 Secure Networks Ltd	Sep. 30, 2013 Settlement Agreement Maximum	Sep. 30, 2013 Related Party Transactions USD ($)	Sep. 30, 2012 Related Party Transactions USD ($)	Sep. 30, 2013 Related Party Transactions USD ($)	Sep. 30, 2012 Related Party Transactions USD ($)	Sep. 30, 2013 Mountain Partners Aktiengesellschaft Payment Solution AG USD ($)	Sep. 30, 2012 Mountain Partners Aktiengesellschaft Payment Solution AG USD ($)	Sep. 30, 2013 Mountain Partners Aktiengesellschaft Payment Solution AG USD ($)	Sep. 30, 2012 Mountain Partners Aktiengesellschaft Payment Solution AG USD ($)	Dec. 31, 2012 Mountain Partners Aktiengesellschaft Payment Solution AG USD ($)	Jan. 30, 2012 Mountain Partners Aktiengesellschaft Payment Solution AG USD ($)	Jan. 30, 2012 Mountain Partners Aktiengesellschaft Payment Solution AG EUR (€)
Related Party Transaction [Line Items]
Percentage of ownership by a related party following acquisition								30.00%	9.00%
Installment payment, contractual payment year										2020
Expense recognized for interest accreted on discounted liability	$ 470,000	$ 542,000	[1]								$ 200,000	$ 200,000	$ 500,000	$ 600,000
Outstanding liability to related party						6,900,000	7,300,000
Liability to related party	1,606,000			1,552,000	[2]	1,100,000	1,100,000								500,000		500,000		500,000
Working capital provided																					250,000
Outstanding loan at acquisition date																				400,000	327,000
Interest rate															8.00%		8.00%
Interest expense															$ 6,900	$ 6,200	$ 21,900	$ 17,200

[1] Certain amounts shown in the table above have changed as compared to amounts reported in prior periods as noted in Item 1, Financial Statements, Note 1 of Notes to Condensed Consolidated Financial Statements, Reclassifications and Restatements.

[2] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2012 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.