Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 49,060	$ 187,026
Investments in marketable securities	309,502	143,325
Accounts receivable	9,464	1,304
Inventories	4,623	3,416
Prepaid expenses and other current assets	19,316	4,993
Total current assets	391,965	340,064
Property and equipment, less accumulated depreciation of $12,515 and $12,495 at December 31, 2017 and 2016, respectively	9,062	9,816
In-process research & development	23,000	486,700
Goodwill	197,797	197,797
Other non-current assets	5,200	2,468
Total Assets	627,024	1,036,845
Current liabilities:
Accounts payable, accrued expenses, and other current liabilities	53,890	41,008
Deferred reimbursements, current portion	7,750	13,850
Contingent consideration payable, current portion	8,400	56,101
Total current liabilities	70,040	110,959
Deferred reimbursements	14,156	21,906
Convertible notes	164,167	154,464
Contingent consideration payable	17,000	213,621
Deferred income taxes	6,465	173,771
Other non-current liability	2,346	1,973
Commitments and contingencies
Stockholders' equity:
Common stock, $.01 par value, 250,000,000 shares authorized, 166,989,790 shares issued and outstanding at December 31, 2017 Common stock, $.01 par value, 250,000,000 shares authorized, 142,691,986 shares issued and outstanding at December 31, 2016	1,721	1,480
Additional paid-in capital	1,400,758	1,120,156
Accumulated other comprehensive loss:
Foreign currency translation adjustment	(1,659)	1,945
Unrealized gain/(loss) on available-for securities	(436)	102
Warrants	16,076	16,076
Accumulated deficit	(1,063,610)	(779,608)
Total stockholders' equity	352,850	360,151
Total Liabilities and Stockholders' Equity	$ 627,024	$ 1,036,845

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.