Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows From Operating Activities
Net income/(loss)	$ 86	$ (7,011)
Adjustments to reconcile net income/(loss) to net cash and cash equivalents provided by operating activities:
Stock-based compensation	1,869	2,424
Deferred taxes	(279)	(19,243)
Depreciation and amortization	10,898	11,183
Acquired in-process research and development ("IPR&D")	0	3,753
Non-cash interest	572	182
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	3,917	(10,250)
Inventories, net	876	3,693
Prepaid expenses and other current assets	379	1,028
Accounts payable	2,462	(1,332)
Accrued royalties	(1,097)	1,201
Current income taxes payable, net	(247)	16,299
Accrued government rebates	846	(871)
Returned goods reserve	1,792	1,019
Accrued expenses, accrued compensation, and other	(1,406)	(365)
Net Cash and Cash Equivalents Provided by Operating Activities	20,668	1,710
Cash Flows From Investing Activities
Acquisition of product rights, IPR&D, and other related assets	(39)	(56,007)
Acquisition of property and equipment, net	(698)	(1,539)
Net Cash and Cash Equivalents Used in Investing Activities	(737)	(57,546)
Cash Flows From Financing Activities
Payments on Term Loan and Delayed Draw Term Loan agreements	(2,377)	(902)
Borrowings under Revolver agreement	0	15,000
Proceeds from stock option exercises and ESPP purchases	0	281
Treasury stock purchases for restricted stock vests	(348)	(488)
Net Cash and Cash Equivalents (Used in)/Provided by Financing Activities	(2,725)	13,891
Net Change in Cash and Cash Equivalents	17,206	(41,945)
Cash, cash equivalents, and restricted cash, beginning of period	12,867	67,361
Cash, cash equivalents, and restricted cash, end of period	30,073	25,416
Reconciliation of cash, cash equivalents, and restricted cash, beginning of period
Cash and cash equivalents	7,864	62,332
Restricted cash	5,003	5,029
Cash, cash equivalents, and restricted cash, beginning of period	12,867	67,361
Reconciliation of cash, cash equivalents, and restricted cash, end of period
Cash and cash equivalents	25,073	20,414
Restricted cash	5,000	5,002
Cash, cash equivalents, and restricted cash, end of period	30,073	25,416
Supplemental disclosure for cash flow information:
Cash paid for interest, net of amounts capitalized	1,983	1,848
Cash paid for income taxes	112	95
Supplemental non-cash investing and financing activities:
Debt issuance costs in accrued expenses	115	0
Acquisition of product rights, IPR&D, and other related assets included in returned goods reserve and accrued liabilities	388	1,940
Property and equipment purchased and included in accounts payable	$ 218	$ 138