Equity Plans and Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based compensation cost by line item

The share-based compensation expense recognized in the Condensed Statements of Operations was as follows:

	For the years ended December 31,
	2013		2012		2011
Share-based compensation cost included in:
Research, development and manufacturing operations	$	228,120	$	304,013	$	302,101
Selling, general and administrative	393,385		620,302		1,270,506
Total share-based compensation cost	$	621,505	$	924,315	$	1,572,607

Share-based compensation cost by award type

The following table presents share-based compensation expense by type:

	For the years ended December 31,
	2013		2012		2011
Type of Award:
Stock Options	$	311,965	$	443,103	$	768,703
Restricted Stock Units and Awards	309,540		481,212		803,904
Total share-based compensation cost	$	621,505	$	924,315	$	1,572,607

Share-based compensation fair value assumptions

Fair value was calculated using the Black-Scholes Model with the following assumptions:

	For the years ended December 31,
	2013		2012		2011
Expected volatility	97.3	%	101.3	%	97.9	%
Risk free interest rate	0.9	%	0.8	%	2.1	%
Expected dividends	—		—		—
Expected life (in years)	5.2		5.2		6.3

Stock option activity

The following table summarizes stock option activity for grants made within the Stock Option Plan and outside the plan (shares in thousands):

	Stock Option Shares		Stock Options Weighted Average Exercise Price			Weighted Average Remaining Contractual Life in Years	Aggregate Intrinsic Value
Outstanding at January 31, 2011	1,516		$	5.14		8.32	$	527,463
Granted	1,295		1.88
Exercised	(57	)	(0.10		)		$	149,007
Forfeited	(1,308	)	4.96
Outstanding at December 31, 2011	1,446		$	2.58		8.77	$	4,437
Granted	45		0.80
Exercised	(14	)	0.68				$	14,081
Forfeited	(257	)	2.54
Outstanding at December 31, 2012	1,220		$	2.54		7.79	$	8,057
Granted	785		$	0.66
Exercised	(48	)	$	0.68			$	5,400
Forfeited	(409	)	$	2.04
Outstanding at December 31, 2013	1,548		$	1.78		7.81	$	51,160
Exercisable at December 31, 2013	596		$	3.21		6.39	$	12,742

Restricted stock activity

The following table summarizes non-vested restricted stock and the related activity as of December 31, 2013 and for the years ended December 31, 2013, 2012 and 2011 (shares in thousands):

	Shares		Weighted  Average Grant-Date Fair-Value
Non-vested at January 1, 2011	246		$	5.48
Granted	488		$	3.19
Vested	(212	)
Forfeited	(281	)
Non-vested at December 31, 2011	241		$	3.09
Granted	658		0.57
Vested	(646	)
Forfeited	(205	)
Non-vested at December 31, 2012	48		$	3.47
Granted	427		$	0.62
Vested	(453	)
Forfeited	(7	)
Non-vested at December 31, 2013	15		$	3.52