Stockholders' Equity - Common and Preferred Shares (Tables)

6 Months Ended

Jun. 30, 2013

Stockholders' Equity - Common and Preferred Shares [Abstract]

Summary of the Company's outstanding common stock warrants

The following is a summary of the Company’s outstanding common stock warrants as of June 30, 2013 and December 31, 2012:

					Number of Warrants outstanding as of:
	Date of				(In thousands)
Warrants Issued in Connection with:	Issuance		Exercise Price		June 30, 2013		December 31, 2012
Committed Equity Financing Facility		02/19/08	$	657.60		1		1
Direct Registration Series I Warrants		07/20/09	$	504.00		12		12
Private Placement Series A Warrants		04/16/13	$	3.40		1,460		—
Private Placement Series B Warrants		04/16/13	$	3.40		1,377		—
Total Warrants Outstanding						2,850		13

Summary of the Company's stock option activity under its 2005 Plan

The following is a summary of the Company’s stock option activity under its 2005 Plan for the six months ended June 30, 2013:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life		Aggregate Intrinsic Value
	(In thousands)					(Years)		(In thousands)
Options outstanding at December 31, 2012		143		$	19.73		8.64	$	—
Granted		77		$	4.38			$	—
Forfeited and expired		(42	)	$	17.66			$	—
Options outstanding at June 30, 2013		178		$	13.66		8.25	$	—
Options exercisable at June 30, 2013		73		$	21.98		6.74	$	—
Options vested or expected to vest at June 30, 2013		134		$	15.60		7.91	$	—

Weighted-average assumptions

The fair values for the stock options granted were estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for the six months ended June 30, 2013:

Weighted Average Assumptions
Risk-free interest rate	0.77	%
Expected life (years)	4
Expected volatility	101	%
Dividend yield	0.00	%