Summary of Deferred Revenue (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Components of deferred revenue
Undelivered elements (training, installation and product and support services)	$ 1,641	$ 1,823
Extended warranty contracts	1,593	1,642
Total deferred revenue	3,234	3,465
Less long-term amounts:
Extended warranty contracts		1
Total deferred revenue, long-term		1
Total deferred revenue, current portion	$ 3,234	$ 3,464

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Amount of deferred revenue from sales of extended warranty contracts expected to be earned within one year.

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Amount of deferred revenue from sales of extended warranty contracts expected to be earned after one year.

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No definition available.

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Amount of deferred revenue from sales of training, installation, product and support services expected to be earned within one year.

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No definition available.

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Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

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The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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