Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 142,837	$ 79,749
Investments in marketable securities	309,903	424,403
Accounts receivable	33,284	21,962
Inventories	14,041	8,390
Prepaid expenses and other current assets	20,008	16,592
Total current assets	520,073	551,096
Operating lease right-of-use assets, less accumulated amortization of $5,342 and $0 at December 31, 2019 and December 31, 2018, respectively	33,315
Property and equipment, less accumulated depreciation of $17,604 and $15,671 at December 31, 2019 and December 31, 2018, respectively	47,705	11,375
In-process research & development	23,000	23,000
Goodwill	197,797	197,797
Other non-current assets	28,317	6,683
Total Assets	850,207	789,951
Current liabilities:
Accounts payable, accrued expenses, and other current liabilities	120,373	80,625
Deferred reimbursements	1,250	5,500
Operating lease liabilities	7,189
Total current liabilities	128,812	86,125
Deferred reimbursements	8,906	10,156
Convertible notes	2,131	175,006
Senior secured term loan	147,374	146,734
Contingent consideration payable	22,681	19,700
Deferred income taxes	5,051	6,465
Operating lease liabilities	53,531
Other non-current liabilities	5,296	2,853
Total Liabilities	373,782	447,039
Commitments and contingencies
Stockholders' equity:
Common stock, $.01 par value, 500,000,000 shares authorized, 255,417,869 and 189,383,924 shares issued and outstanding at December 31, 2019 and December 31, 2018, respectively	2,598	1,942
Additional paid-in capital	2,227,225	1,740,061
Accumulated other comprehensive loss:
Foreign currency translation adjustment	2,785	495
Unrealized gain (loss) on available-for securities	40	(427)
Warrants	12,387	13,063
Accumulated deficit	(1,768,610)	(1,412,222)
Total stockholders' equity	476,425	342,912
Total Liabilities and Stockholders' Equity	$ 850,207	$ 789,951