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

9 Months Ended

Sep. 30, 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 September 30, 2018		As of December 31, 2017
	(in thousands)
Manufacturing-related deposits and prepaids	$	18,465	$	18,650
Leasehold improvement receivable		10,787		—
Prepaid clinical and pre-clinical expenses		10,658		5,175
Prepaid maintenance and license fees		2,415		1,711
Prepaid research expenses		1,939		2,896
Prepaid commercial expenses		2,125		1,589
Asset held for sale		—		1,501
Other prepaids		3,537		2,726
Other		4,874		2,263
Total other current assets	$	54,800	$	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 September 30, 2018		As of December 31, 2017
	(in thousands)
Manufacturing-related deposits	$	40,133	$	—
Strategic investments		30,000		—
Prepaid clinical expenses		4,594		7,488
Alternative minimum tax credit		2,881		3,315
Restricted investment		1,001		784
Long-term available-for-sale securities		—		9,980
Other		55		242
Total other non-current assets	$	78,664	$	21,809