Summary of Restructuring Accrual Activity (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013
Schedule Of Accrual Activity [Line Items]
December 31, 2012	$ 933,732
Charges to Operations
Cash Proceeds, Disbursements	(659,110)
Write Offs and Abandonments
Foreign Exchange Impact	8,441
June 30, 2013	283,063
Employee Severance And Related Benefits
Schedule Of Accrual Activity [Line Items]
December 31, 2012	801,453
Charges to Operations
Cash Proceeds, Disbursements	(613,870)
Write Offs and Abandonments
Foreign Exchange Impact	8,422
June 30, 2013	196,005
Activity Termination and Facility Closure Costs
Schedule Of Accrual Activity [Line Items]
December 31, 2012	132,279
Charges to Operations
Cash Proceeds, Disbursements	(45,240)
Write Offs and Abandonments
Foreign Exchange Impact	19
June 30, 2013	$ 87,058