Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows From Operating Activities
Net (loss)/Income	$ (7,011)	$ 449
Adjustments to reconcile net loss to net cash and cash equivalents provided by operating activities:
Stock-based compensation	2,424	1,710
Deferred taxes	(19,243)	(165)
Depreciation and amortization	11,183	16,103
Acquired in-process research and development ("IPR&D")	3,753	0
Non-cash interest relating to convertible notes and loan cost amortization	182	1,873
Changes in operating assets and liabilities:
Accounts receivable, net	(10,250)	(2,568)
Inventories, net	3,693	(1,529)
Prepaid expenses and other current assets	1,028	358
Accounts payable	(1,332)	2,005
Accrued royalties	1,201	(3,016)
Current income taxes, net	16,299	(1,569)
Accrued government rebates	(871)	(422)
Returned goods reserve	1,019	1,007
Accrued expenses, accrued compensation, and other	(365)	55
Net Cash and Cash Equivalents Provided by Operating Activities	1,710	14,291
Cash Flows From Investing Activities
Acquisition of product rights, IPR&D, and other related assets	(56,007)	(18,510)
Acquisition of property and equipment, net	(1,539)	(1,775)
Net Cash and Cash Equivalents Used in Investing Activities	(57,546)	(20,285)
Cash Flows From Financing Activities
Borrowings under Revolver agreement	15,000	0
Payments on Term loan agreement	(902)	(902)
Proceeds from stock option exercised	281	2,416
Treasury stock purchases for restricted stock vests	(488)	(308)
Net Cash and Cash Equivalents Provided by Financing Activities	13,891	1,206
Change in Cash, Cash Equivalents, and Restricted Cash	(41,945)	(4,788)
Cash, cash equivalents, and restricted cash, beginning of period	67,361	48,029
Cash, cash equivalents, and restricted cash, end of period	25,416	43,241
Reconciliation of cash, cash equivalents, and restricted cash, beginning of period
Cash and cash equivalents	62,332	43,008
Restricted cash	5,029	5,021
Cash, cash equivalents, and restricted cash, beginning of period	67,361	48,029
Reconciliation of cash, cash equivalents, and restricted cash, end of period
Cash and cash equivalents	20,414	38,233
Restricted cash	5,002	5,008
Cash, cash equivalents, and restricted cash, end of period	25,416	43,241
Supplemental disclosure for cash flow information:
Cash paid for interest, net of amounts capitalized	1,848	449
Cash paid for income taxes	95	0
Supplemental non-cash investing and financing activities:
Acquisition of product rights, IPRED and other related assets included in accounts payable	1,940	0
Property and equipment purchased and included in accounts payable	$ 138	$ 170