UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 141,169	$ 228,631
Trade receivables, net	23,615	22,176
Inventory, net	4,405	3,823
Prepaid expenses	7,089	6,959
Other current assets	1,466	1,302
Total current assets	177,744	262,891
NONCURRENT ASSETS:
Property and equipment, net	842	938
Restricted cash	750	750
Intangible assets, net	157,764	162,343
Other noncurrent assets	152	152
Total noncurrent assets	159,508	164,183
TOTAL ASSETS	337,252	427,074
CURRENT LIABILITIES:
Trade payables	4,391	2,556
Accrued compensation	4,523	8,942
Accrued expenses	24,261	122,727
Other current liabilities	262	314
Total current liabilities	33,437	134,539
NONCURRENT LIABILITIES:
Deferred rent	192	212
Long term debt, net	194,913	194,250
Other noncurrent liabilities	831	893
Total noncurrent liabilities	195,936	195,355
TOTAL LIABILITIES	229,373	329,894
COMMITMENTS AND CONTINGENCIES (Note 9)
STOCKHOLDERS’ EQUITY:
Preferred stock - $0.00001 par value; 10,000,000 shares and 0 shares authorized at March 31, 2021 and December 31, 2020, respectively; 0 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively
Common stock—$0.00001 par value; 500,000,000 shares authorized at March 31, 2021 and December 31, 2020, respectively; 56,892,406 shares and 56,890,569 issued and outstanding at March 31, 2021 and December 31, 2020, respectively	1	1
Additional paid in capital	588,687	585,374
Accumulated deficit	(480,809)	(488,195)
TOTAL STOCKHOLDERS’ EQUITY	107,879	97,180
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 337,252	$ 427,074