Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 37,394	$ 187,026
Investments in marketable securities	189,838	143,325
Accounts receivable	3,786	1,304
Inventories	3,948	3,416
Prepaid expenses and other current assets	6,023	4,993
Total current assets	240,989	340,064
Property and equipment, less accumulated depreciation of $ 13,951 and $12,495 at June 30, 2017 and December 31, 2016, respectively	10,471	9,816
In-process research & development	486,700	486,700
Goodwill	197,797	197,797
Other non-current assets	3,009	2,468
Total Assets	938,966	1,036,845
Current liabilities:
Accounts payable, accrued expenses , and other current liabilities	35,645	41,008
Deferred reimbursements, current portion	18,850	13,850
Contingent consideration payable, current portion	46,188	56,101
Total current liabilities	100,683	110,959
Deferred reimbursements	16,906	21,906
Convertible notes	159,171	154,464
Contingent consideration payable	219,162	213,621
Deferred income taxes	173,869	173,771
Other non-current liability	2,283	1,973
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value, 250,000,000 shares authorized,143,371,243 and 142,691,986 shares issued and outstanding at June 30, 2017 and December 31, 2016, respectively	1,485	1,480
Additional paid-in capital	1,132,229	1,120,156
Accumulated other comprehensive loss:
Foreign currency translation adjustment, less tax expense of $1,293 at June 30, 2017 and December 31, 2016	(192)	1,945
Unrealized gain on available-for securities	31	102
Warrants	16,076	16,076
Accumulated deficit	(882,737)	(779,608)
Total stockholders' equity	266,892	360,151
Total Liabilities and Stockholders' Equity	$ 938,966	$ 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.