Financial Instruments and Concentration of Credit Risk - Assets and Liabilities Measured at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ 0		$ 36,582
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	137,828		118,521
Total	137,828		118,521
Contingent consideration			0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Laser Earn-Out Payment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts receivable	0	[1]	0	[1]
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0		0
Total	0		0
Contingent consideration			0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Laser Earn-Out Payment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts receivable	0	[1]	0	[1]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0		0
Total	4,000		40,582
Contingent consideration			36,582	[2]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Laser Earn-Out Payment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts receivable	4,000	[1]	4,000	[1]
Carrying Value [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	137,828		118,521
Total	141,828		159,103
Contingent consideration			36,582	[2]
Carrying Value [Member] | Fair Value, Measurements, Recurring [Member] | Laser Earn-Out Payment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts receivable	$ 4,000	[1]	$ 4,000	[1]

[1] In 2014, the estimated $4.0 million fair value of the Laser Earn-Out Payment was reclassified from contingent consideration to accounts receivable. For additional discussion, refer to Note 3 - Contingent Consideration.

[2] To estimate the fair value of contingent consideration we use a discounted cash flow model based on estimated timing and amount of future cash flows. As at December 31, 2013, we discounted the future cash flows using a cost of capital rate of 9% for the contingent consideration related to Eligard. The cost of capital rate was selected based on available market and industry information. Future cash flows were estimated by utilizing external market research to estimate market size, to which we applied market share, pricing and foreign exchange assumptions based on historical sales data, expected competition and current exchange rates.