Purchase of Intellectual Property - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended		3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013 Developed Technology Rights [Member]	Mar. 31, 2013 Developed Technology Rights [Member]	Jun. 30, 2013 Developed Technology Rights [Member] Installment
Finite-Lived Intangible Assets [Line Items]
Purchase price for the TPM intellectual property					$ 200
Amortization period					3 years
Number of installments					2
Second payment for installment	200		50
Initial payment for installment				$ 150