OTHER CURRENT ASSETS AND OTHER NON-CURRENT ASSETS (Tables)

3 Months Ended

Mar. 31, 2018

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Summary of Other Current Assets

The following table summarizes the Company’s other current assets for each of the periods indicated:

	As of March 31, 2018		As of December 31, 2017
	(in thousands)
Manufacturing-related deposits and prepaids	$	15,049	$	18,650
Prepaid clinical and preclinical expenses		6,103		5,175
Prepaid maintenance and license fees		2,442		1,711
Prepaid research expenses		2,140		2,896
Prepaid commercial expenses		883		1,589
Asset held for sale		—		1,501
Other prepaids		2,186		2,726
Other		2,400		2,263
Total other current assets	$	31,203	$	36,511

Summary of Other Non-current Assets

The following table summarizes the Company’s other non-current assets for each of the periods indicated:

	As of March 31, 2018		As of December 31, 2017
	(in thousands)
Prepaid clinical expenses	$	6,151	$	7,488
Alternative minimum tax credit		3,315		3,315
Manufacturing-related deposits		1,975		—
Restricted cash and investments		784		784
Long-term available-for-sale securities		—		9,980
Other		241		242
Total other non-current assets	$	12,466	$	21,809