Share-based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2017

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

Summary of Share-Based Compensation Expense

The following table summarizes share-based compensation expense, which was allocated as follows (in thousands):

	Three Months Ended  September 30,				Nine Months Ended  September 30,
	2017		2016		2017		2016
Research and development	$	229	$	466	$	521	$	1,887
Selling, general and administrative	1,126		4,602		3,782		9,338
Total share-based compensation expense	$	1,355	$	5,068	$	4,303	$	11,225

Share-Based Compensation Expense by Types of Awards

We incurred share-based compensation expense due to the following types of awards (in thousands):

	Three Months Ended  September 30,				Nine Months Ended  September 30,
	2017		2016		2017		2016
Performance rights	$	—	$	7	$	—	$	575
Restricted stock	232		454		848		3,645
Options	1,123		4,607		3,455		7,005
Total share-based compensation expense	$	1,355	$	5,068	$	4,303	$	11,225