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Summary of Closure Expenses (Detail) (USD $)	12 Months Ended
Summary of Closure Expenses (Detail) (USD $)	Dec. 31, 2013
Summary of Closure Expenses [Line Items]
One-time employee severance costs	$ 80,000
Net lease liability	1,131,000
Fixed asset disposals	771,000
Other closure expenses	148,000
Other Expenses, Total	$ 2,130,000

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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