Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Restricted stock activity during the year ended December 31, 2017 was as follows:


	Number of Restricted Shares			Weighted Average Fair Market Value Per RSU
Outstanding at January 1, 2017		4,584,297		$	7.29
Granted:
Executive officers		1,640,000			1.85
Directors		162,315			2.80
Employees		555,000			2.10
Vested		(1,568,042	)		2.17
Forfeitures		(666,675	)		2.71

Outstanding at December 31, 2017		4,706,895		$	5.20

Summary of Stock Option Activity

Stock option activity for the years ended December 31, 2017, 2016 and 2015 is as follows:


	Number of Shares			Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding at January 1, 2015		3,196,100		$	4.32	$	22,881

Granted in 2015:
Others		684,629			8.14
Exercised		(235,480	)		3.52
Forfeitures		(247,720	)		12.65

Outstanding at December 31, 2015		3,397,529		$	5.42	$	3,124

Granted in 2016:
Officers and Directors		95,000		$	2.34
Others		558,373			3.12
Exercised		(147,425	)		2.01
Forfeitures		(434,486	)		13.17

Outstanding at December 31, 2016		3,468,991		$	4.14	$	0

Granted in 2017:
Officers and Directors		83,658		$	2.64
Others		873,017			1.96
Exercised		(202,519	)		2.17
Forfeitures		(1,510,193	)		5.13

Outstanding at December 31, 2017		2,712,954		$	2.98	$	1,190

Summary of Stock Options Outstanding

Options outstanding at December 31, 2017 are as follows:


Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
$1.00 – 5.00		2,192,695		5.53	$	2.72
$5.01 – 10.00		430,149		5.38	$	6.29
$10.01 – 15.00		48,358		7.14	$	13.13
$15.01 – 20.00		41,500		6.75	$	16.27

		2,712,954					$	1,190

Summary of Stock Options Exercisable

Options exercisable at December 31, 2017 are as follows:


Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
$1.00 – 5.00		1,400,022		3.48	$	3.04
$5.01 – 10.00		345,257		5.43	$	6.28
$10.01 – 15.00		35,439		7.13	$	13.15
$15.01 – 20.00		41,500		6.75	$	16.27

		1,822,218					$	561

Summary of Non-Vested Stock Options

Nonvested stock options as of December 31, 2017, and changes during the year then ended, are as follows:


Nonvested Shares	Shares			Weighted Average Grant Date Fair Value		Intrinsic Value
Nonvested at January 1, 2017		829,431
Granted		960,175
Vested		(363,701	)
Forfeited		(540,421	)

Nonvested at December 31, 2017		885,484		$	2.70	$	629

Summary of Allocated Stock-based Compensation Expense

The Company’s stock-based compensation expense is allocated between research and development and selling, general and administrative as follows as of December 31:


Stock-based compensation expense	2017		2016		2015
Research and Development	$	1.6	$	2.5	$	4.2
Selling, General and Administrative	$	13.2	$	12.4	$	10.0