Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

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

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The weighted-average grant date fair value of employee stock options granted during the years ended December 31, 2012, 2011 and 2010 was $1.05, $1.86 and $1.14 per share, respectively, which was estimated using the following weighted-average assumptions:

	Years Ended December 31,
	2012		2011		2010
Expected volatility	59	%	62	%	65	%
Expected term (in years)	6.0		6.5		6.1
Risk-free interest rate	1.2	%	1.9	%	2.9	%
Expected dividend yield	—		—		—

Schedule of Share-based Compensation, Stock Options, Activity

A summary of our stock option award activity as of and for the year ended December 31, 2012 is as follows (in thousands, except per share data):

	Number of Shares		Weighted- Average Exercise Price per Share		Weighted- Average Remaining Contractual Term (In Years)	Aggregate Intrinsic  Value
Options outstanding at December 31, 2011	1,902		$	2.01
Options exercisable at December 31, 2011	1,468		$	2.13
Options granted	500		$	1.94
Options forfeited	(122	)	1.84
Options expired	(85	)	3.61
Options exercised	(410	)	0.73
Options outstanding at December 31, 2012	1,785		$	2.22	4.60	$	801
Options exercisable at December 31, 2012	1,256		$	2.35	4.20	$	732

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

A summary of our restricted stock unit activity as of and for the year ended December 31, 2012 is as follows (in thousands, except per share data):

	Number of Shares		Weighted- Average Grant Date Fair Value Per Share
Non-vested restricted stock units outstanding at December 31, 2011	284		$	2.15
Granted	50		$	1.82
Forfeited	(55	)	$	2.34
Vested	(164	)	$	2.14
Non-vested restricted stock units outstanding at December 31, 2012	115		$	1.94

The following table summarizes information about restricted stock units that vested during the years ended December 31, 2012, 2011 and 2010 based on service conditions (in thousands):

	Years Ended December 31,
	2012		2011		2010
Fair value on vesting date of vested restricted stock units	$	350	$	507	$	362

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Allocation of Share-Based Compensation Expense

Total share-based compensation expense related to all of our share-based units for the years ended December 31, 2012, 2011 and 2010 was allocated as follows (in thousands):

	Years Ended December 31,
Cost of revenues:	2012		2011		2010
DIS	$	7	$	13	$	26
Diagnostic Imaging	82		99		60
Research and development	78		84		61
Marketing and sales	127		110		113
General and administrative	336		494		614
Share-based compensation expense	$	630	$	800	$	874