Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense was as follows:

	Three Months Ended March 31,
	2016		2015
Stock-based compensation expense recognized as:
R&D expense	$	6,037	$	5,811
SG&A expense		8,174		7,561
Total	$	14,211	$	13,372