CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended			8 Months Ended	9 Months Ended
	Sep. 30, 2020	Aug. 31, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019	Aug. 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net (loss) income		$ 4,384	$ (32,011)	$ (17,966)	$ 6,617	$ (77,955)		$ (15,863)
Less: (Loss) income from discontinued operations		15,236		(6,155)		(34,915)		12,414
Net loss from continuing operations		(10,852)		(11,811)		(43,040)		(28,277)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of convertible notes conversion option and debt issuance costs						622		5,776
Accreted interest on convertible note principal						44		79
Amortization of intangible assets		204		321		841		983
Amortization of right-of-use assets						497		544
Loss on investment						5,576		0
Change in fair value of derivative assets						110		(48)
Gain on sale of intangible assets		0		(3,476)		0		(3,476)
Loss on extinguishment of convertible notes		0	3,900	3,900		606		3,900
Other amortization and depreciation						1,017		2,124
Loss on disposal of property and equipment						331		0
Stock-based compensation expense						18,802		5,192
Deferred income taxes						(18,723)		8,936
Changes in assets and liabilities:
Accounts receivable	$ 9,078					3,344		1,462
Prepaid and other current assets						(29,875)		1,706
Inventory						(8,062)		(3,079)
Other assets	1,768					306		337
Accounts payable						371		6,502
Accrued liabilities						5,762		3,518
Other long-term liabilities						1,030		493
Net cash (used in) provided by operating activities - continuing operations						(60,441)		6,672
Net cash provided by (used in) operating activities - discontinued operations						28,318		(19,971)
Cash flows from investing activities
Settlement agreement cash received							$ 7,500	0
Proceeds from the sale of intangible assets							0	5,000
Purchase of intangible assets						0		(1,700)
Property and equipment, net purchases						(221)		(504)
Net cash provided by investing activities - continuing operations						7,279		2,796
Net cash provided by (used in) investing activities - discontinued operations						38,966		(1,710)
Cash flows from financing activities
Proceeds from the exercise of stock options						461		0
Repurchase of convertible notes			(97,900)			(18,845)		0
Repayments of Convertible Debt							0	(7,451)
Net receipts (payments) for capped call transactions						801		(3,694)
Payment of contingent consideration						0		(1,071)
Repurchase of Company common stock						(39,373)		(75,891)
Net settlement of stock-based compensation awards						(3,462)		0
Net cash used in financing activities - continuing operations						(60,418)		(88,107)
Net cash used in financing activities - discontinued operations						(359)		0
Net decrease in cash and cash equivalents						(46,655)		(100,320)
Cash and cash equivalents at beginning of the period	$ 146,796		$ 193,451		$ 394,590	193,451	$ 193,451	394,590
Cash and cash equivalents at end of the period		146,796		294,270		146,796		294,270
Less: Cash and cash equivalents of discontinued operations		25,060		16,982		25,060		16,982
Cash and cash equivalents of continuing operations at end of period		$ 121,736		$ 277,288		121,736		277,288
Supplemental cash flow information
Cash refunded for income taxes						(4)		(2,685)
Cash paid for interest						298		2,063
Supplemental schedule of non-cash investing and financing activities
Noncash liquidating distribution						$ 64,400		$ 0