Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

The estimated useful lives, by asset classification, are as follows:


Asset Classification		Useful Lives
Computer equipment and software		3 - 5 years
Furniture and fixtures		5 years
Leasehold Improvements		Lesser of useful life or lease term

Liability Measured at Fair Value on a Recurring Basis

The following table presents information about the Company’s liability as of December 31, 2011 and 2010 that is measured at fair value on a recurring basis and indicates the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value:


	December 31, 2011
*In thousands*	Total		Level 1		Level 2		Level 3
Asset:
Cash equivalents	$	39	$	39	$	—	$	—

Liability:
Warrant derivative liability	$	123,125	$	—	$	—	$	123,125


	December 31, 2010
*In thousands*	Total		Level 1		Level 2		Level 3
Liability:
Warrant derivative liability	$	230,069	$	—	$	—	$	230,069

Change in Fair Value of Warrant Derivative Liabilities

The change in the fair value of the warrant derivative liabilities is as follows (in thousands):


	October 2009 Warrants			June and July 2009 Warrants			May 2008 Participation Rights			December 2007 Warrants			Totals
Balance at December 31, 2008	$	—		$	—		$	504		$	533		$	1,037

Initial measurement, June and July 2009 warrants		—			2,803			—			—			2,803
Initial measurement, October 2009 financing warrants		47,105			—			—			—			47,105
Initial measurement, October 2009 warrants issued to employees		1,210			—			—			—			1,210
(Gain) loss on change in fair value of derivative liability		(6,625	)		1,513			(504	)		479			(5,137	)
Compensation income for change in fair value of warrants issued to former employees		(170	)											(170	)
Transfers to equity		—			(4,316	)		—			(1,012	)		(5,328	)

Balance at December 31, 2009	$	41,520		$	—		$	—		$	—		$	41,520

Gain on change in fair value of derivative liability		205,153			—			—			—			205,153
Compensation expense for change in fair value of warrants issued to former employees		5,713												5,713
Transfers to equity		(22,317	)		—			—			—			(22,317	)

Balance at December 31, 2010	$	230,069		$	—		$	—		$	—		$	230,069

Loss on change in fair value of derivative liability		22,669			—			—			—			22,669
Compensation income for change in fair value of warrants issued to former employees		(96	)											(96	)
Transfers to equity		(129,517	)		—			—			—			(129,517	)

Balance at December 31, 2011	$	123,125		$	—		$	—		$	—		$	123,125

- Definition

Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

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