Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014 Country	Jun. 30, 2013	Jun. 30, 2014 Country	Jun. 30, 2013
Schedule Of Accounting Policies [Line Items]
Number of Countries in which Entity Operates	14		14
Gain or loss from foreign currency transactions	$ 99	$ 0	$ (61)	$ (91)
Percent of renewals within median VSOE range	80.00%
Range within median renewal percentage rate	15.00%
VSOE transaction agreement initial, Term years	2 years
Cash equivalents maturity, Term	Cash equivalents are high-quality short term money market instruments, with original maturities of three months or less.
Software development costs were capitalized	$ 0		$ 0
Patents [Member]
Schedule Of Accounting Policies [Line Items]
Estimated useful lives of assets	20 years
Minimum [Member]
Schedule Of Accounting Policies [Line Items]
Estimated useful lives of assets	3 years
Warranty for hardware purchase	1 year
Extended product warranty period	1 year
Minimum [Member] | Software Development Costs [Member]
Schedule Of Accounting Policies [Line Items]
Estimated economic life of product	2 years
Minimum [Member] | Proprietary Technology [Member]
Schedule Of Accounting Policies [Line Items]
Estimated useful lives of assets	3 years
Maximum [Member]
Schedule Of Accounting Policies [Line Items]
Estimated useful lives of assets	7 years
Warranty for hardware purchase	2 years
Extended product warranty period	4 years
Maximum [Member] | Software Development Costs [Member]
Schedule Of Accounting Policies [Line Items]
Estimated economic life of product	5 years
Maximum [Member] | Proprietary Technology [Member]
Schedule Of Accounting Policies [Line Items]
Estimated useful lives of assets	7 years