Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted

The weighted average for key assumptions used in determining the fair value of options granted during the three months ended March 31, 2015 follows:

Expected price volatility	73.29	%
Risk-free interest rate	1.37	%
Weighted average expected life in years	6 years
Dividend yield	—

Summary of Option Activity

Option activity during the three months ended March 31, 2015 was as follows:

	Number of Shares			Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding at January 1, 2015		3,196,100		$	4.32
Granted in 2015:
Officers and Directors		—			—
Others		87,693			13.17
Exercised		(38,454	)		3.41
Forfeitures		(71,237	)		10.22
Outstanding at March 31, 2015		3,174,102		$	5.39	$	18,025

Summary of Restricted Stock Activity

Restricted stock activity during the three months ended March 31, 2015 was as follows:

	Number of Restricted Shares			Weighted Average Fair Market Value Per RSU
Outstanding at January 1, 2015		2,849,076		$	6.08
Granted in 2015:
Executive officers		2,102,615			14.63
Directors		—			—
Vested		(694,269	)		14.39
Forfeitures		(65,853	)		11.69
Outstanding at March 31, 2015		4,191,569		$	10.12