Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash Flows From Operating Activities
Net loss	$ (14,020)	$ (19,347)
Adjustments to reconcile net loss to net cash and cash equivalents provided by operating activities:
Stock-based compensation	4,713	8,160
Deferred taxes	(6,676)	(14,100)
Depreciation and amortization	22,222	22,381
Acquired in-process research and development ("IPR&D")	0	3,753
Non-cash interest	1,141	705
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	3,145	(1,033)
Inventories, net	2,823	4,055
Prepaid expenses and other current assets	1,202	878
Accounts payable	1,688	665
Accrued royalties	(1,719)	920
Current income taxes payable, net	(6,281)	9,362
Accrued government rebates	914	816
Returned goods reserve	4,754	3,408
Accrued expenses, accrued compensation, and other	7,003	1,967
Net Cash and Cash Equivalents Provided by Operating Activities	20,909	22,590
Cash Flows From Investing Activities
Acquisition of product rights, IPR&D, and other related assets	(21,057)	(58,130)
Acquisition of property and equipment, net	(1,630)	(2,264)
Net Cash and Cash Equivalents Used in Investing Activities	(22,687)	(60,394)
Cash Flows From Financing Activities
Payments on Term Loan and Delayed Draw Term Loan agreements	(5,206)	(3,279)
Borrowings under Revolver agreement	24,000	15,000
Payments on Revolver agreement	0	(7,500)
Proceeds from stock option exercises and ESPP purchases	336	449
Payments of debt issuance costs	(141)	0
Treasury stock purchases for restricted stock vests	(816)	(1,523)
Net Cash and Cash Equivalents Provided by Financing Activities	18,173	3,147
Net Change in Cash and Cash Equivalents	16,395	(34,657)
Cash and cash equivalents, and restricted cash, beginning of period	12,867	67,361
Cash and cash equivalents, and restricted cash, end of period	29,262	32,704
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 and 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	24,261	27,702
Restricted cash	5,001	5,002
Cash and cash equivalents, and restricted cash, end of period	29,262	32,704
Supplemental disclosure for cash flow information:
Cash paid for interest, net of amounts capitalized	3,953	3,541
Cash paid for income taxes	8,360	523
Supplemental non-cash investing and financing activities:
Debt issuance costs in accrued expenses	81	0
Property and equipment purchased and included in accounts payable	$ 119	$ 161