Stock Options (Tables)

12 Months Ended

Dec. 31, 2013

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Shares authorized under stock option plans, by exercise price range

Additional information as of December 31, 2013 is as follows (options in thousands):

	Outstanding				Exercisable
Range of price	Number of Options	Weighted Average Remaining Contractual Life (In Years)	Weighted Average Exercise Price		Number of Options	Weighted Average Exercise Price
$0.90 – $1.80	289	7.55	$	1.28	89	$	1.44
$1.84 – $2.05	971	8.66	1.97		95	1.89
$2.12 – $2.88	199	6.56	2.36		103	2.42
$3.02 – $3.47	260	8.20	3.07		50	3.02
$3.80 – $8.60	73	0.84	5.48		73	5.48
	1,792	7.86	$	2.21	410	$	2.71

Schedule of nonvested options activity

A summary of unvested options as of, and changes during the years ended December 31, 2013 and 2012, is presented below (options in thousands):

	Options		Weighted Average Grant Date Fair Value
Unvested options outstanding, January 1, 2012	180		$	1.72
Granted	1,310		2.30
Vested	(77	)	1.27
Forfeited	(161	)	2.33
Unvested options outstanding, December 31, 2012	1,252		$	2.27
Granted	1,075		1.39
Vested	(85	)	1.43
Forfeited	(860	)	2.25
Unvested options outstanding, December 31, 2013	1,382		$	1.57

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Weighted average grant date fair value of options

The weighted average fair value of each option granted is estimated on the date of grant using the Black-Scholes option valuation model with the following weighted average assumptions during the years ended December 31, 2013 and 2012:

	Year Ended December 31,
	2013	2012
Risk free interest rate	0.8%	0.9%
Expected option lives	5 years	5 years
Expected volatility	103.2%	111.0%
Estimated forfeiture rate	10%	10%
Expected dividend yields	—	—
Weighted average grant date fair value of options	$1.39	$2.30

Summary of options granted, exercised, expired and forfeited

A summary of options granted, exercised, expired and forfeited under our plans and options outstanding as of, and changes made during, the years ended December 31, 2013 and 2012 (options in thousands):

	Outstanding				Exercisable
	Number of Options		Weighted Average Exercise Price		Number of Options	Weighted Average Exercise Price
Options outstanding, January 1, 2012	750		$	2.90	570	$	3.12
Granted	1,310		3.20
Exercised	(6	)	1.62
Expired	(11	)	7.61
Forfeited	(186	)	3.00
Options outstanding, December 31, 2012	1,857		$	3.07	605	$	2.93
Granted	1,075		1.84
Exercised	(70	)	1.61
Expired	(14	)	13.56
Forfeited	(1,056	)	3.16
Options outstanding, December 31, 2013	1,792		$	2.21	410	$	2.71

Stock option compensation expense is allocated

Stock option compensation expense relating to stock option awards is allocated as follows for the years ended December 31, 2013 and 2012 (in thousands):

	Year Ended December 31,
	2013		2012
Cost of revenue	$	—	$	—
Research and development	—		1
Sales and marketing	—		2
General and administrative	646		206
	$	646	$	209