Deferred Revenue and Customer Advances - Deferred Revenue and Customer Advances Expected to be Recognized as Revenue by Year (Detail) (USD $)	Sep. 30, 2013
Deferred Revenue Disclosure [Abstract]
Remainder of 2013	$ 515,000
2014	3,087,000
2015	2,074,000
2016	1,299,000
2017	265,000
2018 and thereafter	165,000
Total deferred revenue and customer advances	$ 7,405,000

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Deferred revenue and customer advances to be recognized.

No definition available.

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Deferred revenue and customer advances to be recognized for reminder of fiscal year.

No definition available.

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Deferred revenue and customer advances to be recognized in year five and thereafter.

No definition available.

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Deferred revenue and customer advances to be recognized in year four.

No definition available.

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Deferred revenue and customer advances to be recognized in year three.

No definition available.

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Deferred revenue and customer advances to be recognized in year two.

No definition available.

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Deferred revenue and customer advances to be recognized next twelve months.

No definition available.

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