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Restructuring and Other Charges (Detail) - Summary of Restructuring Reserve Activity - 2012 (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Initial charge	$ 385,610	$ 1,713,498
Restructuring Reserve 2012 [Member]
Balance	2,680,006	0
Initial charge	0	1,713,498
Noncash deductions	0	(847,980)
Reduction to prior estimate	(7,586)	0
Payments	(849,308)	(27,367)
Balance	$ 1,823,112	$ 838,151

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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- Definition

Net total Increase or Decrease in the accrual for restructuring costs during the reporting period.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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