Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Weighted-Average Assumptions Used for Grants Made Under Stock Option Plans

The following weighted-average assumptions were used for grants made under the stock option plans for the years ended December 31, 2015, 2014 and 2013:

	2015
	Directors			Executives			Employees
Expected volatility		147.57-148.95	%		145.87-148.05	%		148.06	%
Expected term		6.8 years			6.8 years			6.8 years
Risk-free interest rate		1.83-1.93	%		1.58-1.90	%		1.99	%
Dividend yield		0	%		0	%		0	%
Annual forfeiture rate		14.5	%		14.5	%		14.5	%

	2014
	Directors			Executives			Employees
Expected volatility		143.09-145.11	%		142.69	%		145.03	%
Expected term		6.8 years			6.8 years			6.8 years
Risk-free interest rate		1.97-2.20	%		2.22	%		1.75	%
Dividend yield		0	%		0	%		0	%
Annual forfeiture rate		14.5	%		14.5	%		14.5	%

	2013
	Directors			Executives			Employees
Expected volatility		138.29-141.54	%		134.9	%		134.9-141.98	%
Expected term		6.8 years			6.8 years			6.8 years
Risk-free interest rate		1.45-2.24	%		1.21	%		1.21-2.03	%
Dividend yield		0	%		0	%		0	%
Annual forfeiture rate		14.5	%		14.5	%		14.5	%

Summary of Transactions Involving Stock Options Awarded

Transactions involving stock options awarded under the Plans described above during the years ended December 31, 2015, 2014 and 2013 are summarized as follows:

	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term in Years		Aggregate Intrinsic Value
								(In thousands)
Outstanding at December 31, 2012		4,150,410		$	1.07		8.4	$	1,076
Granted		505,000		$	0.20
Expired		(88,000	)	$	3.03
Forfeited		(226,660	)	$	1.61
Outstanding at December 31, 2013		4,340,750		$	0.90		7.8	$	56
Granted		495,000		$	0.31
Expired		(2,000	)	$	5.20
Forfeited		(13,000	)	$	0.67
Outstanding at December 31, 2014		4,820,750		$	0.84		7.1	$	223
Granted		1,785,000		$	0.57
Expired		(58,500	)	$	4.81
Outstanding at December 31, 2015		6,547,250		$	0.73		7.0	$	969
Vested and exercisable at December 31, 2015		4,197,244		$	0.79		6.2	$	874
Vested and expected to vest at December 31, 2015		6,211,254		$	0.74		7.0	$	959

Director Stock Plan [Member]

Summary of Transactions Involving Stock Options Awarded

Transactions involving stock options awarded under the Directors Stock Plan during the years ended December 31, 2015, 2014 and 2013 are summarized as follows:

	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term in Years		Aggregate Intrinsic Value
								(In thousands)
Outstanding at December 31, 2012		42,000		$	5.93		1.9
Expired		(21,000	)	$	2.89
Outstanding at December 31, 2013		21,000		$	8.97		2.7
Outstanding at December 31, 2014		21,000		$	8.97		1.4
Outstanding at December 31, 2015		21,000		$	8.97		0.4
Vested and Exercisable at December 31, 2015		21,000		$	8.97		0.4	$	—

Non-Plan Options [Member]

Summary of Transactions Involving Stock Options Awarded

Transactions involving awards of Non-Plan Options during the years ended December 31, 2015, 2014 and 2013 are summarized as follows:

	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term in Years		Aggregate Intrinsic Value
								(In thousands)
Outstanding at December 31, 2012		5,000		$	3.15		0.5
Expired		(5,000	)		3.15
Outstanding at December 31, 2013		—		$	—		—
Outstanding at December 31, 2014		—		$	—		—
Outstanding at December 31, 2015		—		$	—		—
Vested and Exercisable at December 31, 2015		—		$	—		—	$	—