Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows From Operating Activities:
Loss from continuing operations	$ (39,820)	$ (19,172)
Income from discontinued operations, net of income taxes (Note 11)	20,665	3,356
Net loss	(19,155)	(15,816)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,331	6,995
Stock-based compensation	8,000	4,478
Non-cash lease expense (Note 9(a))	509
Accretion of debt discount on 2018 Convertible Notes, recorded to interest expense	0	533
Amortization of deferred financing costs on 2018 Convertible Notes, recorded to interest expense	0	61
Unrealized gains from transactions denominated in foreign currency	(1)	(8)
Deferred tax liabilities	(1,469)	9
Gain on Commercial Product Portfolio Transaction (Note 11)	(33,644)	0
Unrealized loss (gain) on marketable securities (Note 3(a))	12,183	(10,196)
Change in fair value of contingent consideration (Note 9(b))	1,478	291
Changes in operating assets and liabilities:
Accounts receivable, net	14,914	(583)
Other receivables	(3,776)	(762)
Inventories	(2,037)	657
Prepaid expenses and other assets	512	2,134
Other assets	(980)	(1,693)
Accounts payable and other accrued obligations	(14,255)	(7,207)
Accrued payroll and benefits	(4,685)	(5,860)
FOLOTYN development liability	(4)	(103)
Other long-term liabilities	1,024	325
Net cash used in operating activities	(40,055)	(26,745)
Cash Flows From Investing Activities:
Proceeds from Commercial Product Portfolio Transaction (Note 1(b))	158,765	0
Proceeds from redemption of corporate-owned life insurance policy	0	4,130
Redemption of mutual funds	0	(1)
Purchases of property and equipment	(314)	(52)
Net cash provided by investing activities	158,451	4,077
Cash Flows From Financing Activities:
Proceeds from employees for exercises of stock options	831	1,920
Proceeds from employees, for our remittance to tax authorities, upon vesting of restricted stock and exercises of stock options	0	4,645
Payments to tax authorities upon employees' surrender of restricted stock at vesting and exercises of stock options	0	(27,686)
Net cash provided by (used in) financing activities	831	(21,121)
Effect of exchange rates on cash, cash equivalents and restricted cash	(55)	(21)
Net increase (decrease) in cash, cash equivalents and restricted cash	119,172	(43,810)
Cash, cash equivalents and restricted cash—beginning of period	157,480	227,323
Cash, cash equivalents and restricted cash—end of period	276,652	183,513
Supplemental disclosure of cash flow information:
Cash paid for facility and equipment under lease	471
Cash paid for income taxes	$ 33	$ 0