UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net (loss) income	$ (12,236)	$ 25,910
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	1,985	837
Loss (gain) on sale of marketable securities	662	(287)
Remeasurement of related party acquisition-related contingent consideration	2,968	(6,971)
Remeasurement of related party financing-related contingent consideration	395	(550)
Amortization of debt discount and debt issuance costs	657	0
Change in deferred tax and income tax deferred charge	(2,851)	0
Stock-based compensation expense	2,134	2,047
Other adjustments	(5)	0
Net changes in assets and liabilities
Accounts receivable	(1,891)	4,376
Inventories	(466)	(2,148)
Prepaid expenses and other current assets	(2,285)	(1,354)
Accounts payable & other current liabilities	6,374	1,456
Accrued expenses	(5,854)	2,714
Accrued income taxes	32	8,538
Earn-out payments for related party contingent consideration in excess of acquisition-date fair value	(5,790)	(7,166)
Royalty payments for related party payable in excess of original fair value	(825)	(1,003)
Other assets and liabilities	(1,012)	(1,091)
Net cash (used in) provided by operating activities	(18,008)	25,308
Cash flows from investing activities:
Purchases of property and equipment	(41)	(334)
Proceeds from sales of marketable securities	194,400	14,419
Purchases of marketable securities	(275,098)	(46,074)
Net cash used in investing activities	(80,739)	(31,989)
Cash flows from financing activities:
Earn-out payments for related party contingent consideration	(402)	(444)
Proceeds from debt issuance	143,750	0
Payments for debt issuance costs	(5,391)	0
Share repurchases	(18,000)	0
Exercise of warrants	2,911	0
Other financing activities, net	47	38
Net cash provided by (used in) financing activities	122,915	(406)
Effect of foreign currency exchange rate changes on cash and cash equivalents	179	108
Net change in cash and cash equivalents	24,347	(6,979)
Cash and cash equivalents at January 1,	16,564	39,215
Cash and cash equivalents at March 31,	40,911	32,236
Supplemental disclosures of cash flow information:
Interest paid	263	263
Income taxes paid	$ 90	$ 0