Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income (loss)		$ 29,149	$ (102,670)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization		728	8,030
Amortization of debt discount		6,745	6,973
Unrealized foreign currency transaction losses, net		768	352
Stock compensation expense		4,454	6,643
Gain on sale of business		(168,955)	0
Loss on short-term investments		29,989	0
Reserve for excess or obsolete inventory		(410)	0
Changes in contingent purchase price		(262)	8,512
Changes in operating assets and liabilities:
Accounts receivable		(4,206)	(400)
Inventory, net		1,213	(790)
Prepaid expenses and other assets		5,552	3,907
Accounts payable		(4,351)	(10,972)
Accrued expenses		(9,931)	(21,395)
Other current liabilities		(4,047)	(294)
Payments on contingent purchase price		(19)	(12,343)
Other liabilities		4,262	(5,155)
Net cash used in operating activities		(109,321)	(119,602)
Cash flows from investing activities:
Purchases of fixed assets		(7)	(1,333)
Proceeds from sale of business		166,383	0
Net cash provided by (used in) investing activities		166,376	(1,333)
Cash flows from financing activities:
Proceeds from issuances of common stock, net		8,683	24,694
Payments on contingent purchase price		(171)	(8,723)
Purchase of shares of non-controlling interest		0	(167)
Net cash provided by financing activities		8,512	15,804
Effect of exchange rate changes on cash		(962)	16
Increase (decrease) in cash, cash equivalents and restricted cash		64,605	(105,115)
Cash, cash equivalents and restricted cash at beginning of period		156,900	546,867
Cash, cash equivalents and restricted cash at end of period	[1]	221,505	441,752
Supplemental disclosure of cash flow information:
Interest paid		10,534	11,611
Reconciliation of cash, cash equivalents and restricted cash
Total cash, cash equivalents and restricted cash		$ 156,900	$ 546,867

[1] The following table provides a reconciliation of cash, cash equivalents and restricted cash to amounts reported within the condensed consolidated balance sheet:Reconciliation of cash, cash equivalents and restricted cash Cash and cash equivalents$215,962 436,715Restricted cash5,543 5,037Total cash, cash equivalents and restricted cash$221,505 $441,752