Discontinued Operations and Assets Held for Sale - Summary of Operating Results of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Discontinued Operations And Disposal Groups [Abstract]
Total revenues			$ 25,475		$ 42,228
Recovery on (write-down of) assets held for sale	153		(1,056)	[1]
Operating pre-tax income (loss)	149		(7,643)		2,576
Gain on sale of discontinued operations	1,053	[2]	101,412	[3]
Pre-tax income	1,202	[4]	93,769	[4]	2,576	[4]
Provision for income taxes	(235)	[5]	(5,807)	[6]	(1,613)	[7]
Net income from discontinued operations	$ 967		$ 87,962		$ 963

[1] During the year ended December 31, 2012, we recorded a $1.1 million impairment charge on certain property, plant and equipment that was eliminated pursuant to our restructuring (see Note 9 - Restructuring Charges).

[2] During the year ended December 3 1, 2013, the net gain on sale of discontinued operations of $1.1 million represents total proceeds of $1.2 million related to the sale of our PPDS Technology to Mati in April 2013; net of the $0.2 million carrying value of certain equipment sold, which was previously classified as held for sale, and a negligible amount of transaction fees.

[3] During the year ended December 31, 2012, the net gain of $101.4 million relates to the gain on the sale of our Visudyne business to Valeant in September 2012.

[4] The results for the years ended December 31, 2013, 2012 and 2011 include operating pre-tax losses of $0.4 million, $18.8 million and $19.1 million, respectively, related to our PPDS Technology. The remaining amounts of pre-tax operating income (losses) relate to Visudyne.

[5] During the year ended December 31, 2013, the provision for income taxes related to discontinued operations was $0.2 million. The provision primarily relates to the drawdown of a prepaid tax asset that was recorded in a prior year in connection with the intercompany transfer of certain intellectual property and the subsequent sale of such technology to Mati in April 2013. The provision for income taxes on discontinued operations also reflects our position of having insufficient evidence to support current or future realization of the tax benefits associated with expenditures related to our discontinued operations.

[6] During the year ended December 31, 2012, the provision for income taxes related to discontinued operations was $5.8 million. The provision primarily relates to the recognition of the tax cost of utilizing the tax shield associated with our operating losses realized from continuing operations. The provision also reflected that substantially all of the remaining balance of the tax impact of the gain on sale from discontinued operations was offset by tax basis and other tax attributes (e.g. loss carryforwards) which previously had a valuation allowance.

[7] During the year ended December 31, 2011, the provision for income taxes related to discontinued operations was $1.6 million. The provision primarily related to income taxes associated with our mix of income allocable to our activities in the U.S., as well as the reversal of a prepaid tax asset set up in 2010 in connection with certain profits on intercompany sales of inventory that had not been sold to third parties at that time.