Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net loss	$ (101,481)	$ (87,109)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	11,952	4,066
Depreciation and amortization	76	408
Amortization of debt issuance costs and debt discount	0	753
Net accretion and amortization of investments in marketable securities	(521)	0
Loss on extinguishment of debt	0	3,378
Inventory write-down	0	2,232
Asset impairment charges	0	1,116
Change in fair value of common stock warrant liabilities	95	(360)
Change in fair value of contingent consideration	3,200	11,600
Changes in operating assets and liabilities:
Trade accounts receivable	0	9,356
Inventory	0	2,583
Prepaid expenses and other current assets	1,429	4,996
Other assets	551	(2,413)
Accounts payable, accrued and other liabilities	1,463	4,204
Deferred revenue	0	(1,245)
Net cash used in operating activities	(83,236)	(46,435)
Investing activities:
Purchases of marketable securities	(375,612)	0
Purchases of property and equipment	(75)	(35)
Net cash used in investing activities	(375,687)	(35)
Financing activities:
Proceeds from issuance of common stock under equity incentive plans	6,749	271
Taxes paid related to net share settlement of equity awards	(1,426)	0
Proceeds from issuance of common stock under an at-the-market offering, net of issuance costs	323,135	19,378
Net cash provided by financing activities	328,458	19,649
Net decrease in cash and cash equivalents	(130,465)	(26,821)
Cash and cash equivalents, beginning of the period	293,503	91,551
Cash and cash equivalents, end of the period	163,038	64,730
Noncash financing activities
Extinguishment of Endo working capital advance note payable through net settlement of balances owed to the Company	$ 0	$ 7,000