Share Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

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, 2014, 2013, and 2012 was $0.70, $1.06, and $1.05 per share, respectively, which was estimated using the following weighted-average assumptions:

	Year Ended December 31,
	2014		2013		2012
Expected volatility	43	%	56	%	59	%
Expected term (in years)	4.1		4.6		6.0
Risk-free interest rate	1.2	%	0.9	%	1.2	%
Expected dividend yield	5.7	%	—		—

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, 2014 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, 2013	856		$	1.93
Options exercisable at December 31, 2013	501		$	1.75
Options granted	750		$	3.38
Options forfeited	(45	)	3.21
Options expired	(5	)	6.98
Options exercised	(98	)	1.92
Options outstanding at December 31, 2014	1,458		$	2.62	5.0	$	2,537
Options exercisable at December 31, 2014	553		$	1.82	3.4	$	1,403

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, 2014 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, 2013	—	$	—
Granted	88	3.81
Forfeited	—	—
Vested	—	—
Non-vested restricted stock units outstanding at December 31, 2014	88	$	—

The following table summarizes information about restricted stock units that vested during the years ended December 31, 2014, 2013, and 2012 based on service conditions (in thousands):

	Year Ended December 31,
	2014		2013		2012
Fair value on vesting date of vested restricted stock units	$	—	$	136	$	350

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, 2014, 2013, and 2012 was allocated as follows (in thousands):

	Year Ended December 31,
Cost of revenues:	2014		2013		2012
Diagnostic Services	$	1	$	6	$	7
Diagnostic Imaging	26		49		82
Research and development	—		9		78
Marketing and sales	51		52		127
General and administrative	248		224		336
Share-based compensation expense	$	326	$	340	$	630