Legal Proceedings - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	1 Months Ended					3 Months Ended		1 Months Ended
	Oct. 27, 2012	Sep. 04, 2012 Stockholder Derivative Litigation	Jun. 13, 2012 Stockholder Derivative Litigation	Sep. 30, 2009 Stockholder Derivative Litigation	Oct. 06, 2009 Stockholder Derivative Litigation	Aug. 31, 2009 Stockholder Derivative Litigation	Oct. 27, 2013 Stockholder Derivative Litigation Subsequent Event	Oct. 27, 2013 Stockholder Derivative Litigation Subsequent Event Purchase Price Allocation Adjustments	Aug. 05, 2011 Lina	Jun. 06, 2011 LSI Corporation	Oct. 11, 2011 Dustin Torrez	Apr. 17, 2012 Kevin Khoa Nguyen	Jan. 01, 2011 Deep9	Jul. 24, 2012 Technology Properties Limited Complaint Class One	Jul. 24, 2012 Technology Properties Limited Complaint Class Two	Oct. 24, 2012 PIN Pad Litigation	Oct. 27, 2012 PIN Pad Litigation Nowak	Oct. 29, 2012 PIN Pad Litigation Future Period Winstead	Nov. 02, 2012 PIN Pad Litigation Future Period Honor Et Ano	Nov. 09, 2012 PIN Pad Litigation Future Period Dieffenbach
Loss Contingencies [Line Items]
Number of putative shareholder derivative complaints filed					1	5			1	1	1	1	1	1	1	1	1	1	1	1
Consolidated cases, number of lawsuits				5
Purchase price waived in litigation settlement			$ 22,750
Attorney fee award cost		7,000
Estimated settlement accrual through selling and administration expenses							4,657
Adjustment to additional paid in capital on purchase price waived if the Settlement Agreement approved	$ 24,292		$ 22,750					$ 1,542