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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net income (loss)	$ 4,772	$ (3,856)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation of property and equipment	515	634
Stock-based compensation	7,600	8,608
Amortization of premiums and accretion of discounts on marketable securities	(4,241)	(2)
Loss on sale of marketable securities	655	0
Intangible asset amortization	757	758
Deferred income taxes	3,469	2,550
Other non-cash adjustments, net	1,844	975
Changes in operating assets and liabilities:
Accounts receivable	(199)	3,575
Prepaid expenses and other assets	8,527	(13,691)
Inventory	210	(1,582)
Accounts payable and other liabilities	(14,035)	13,732
Product revenue allowances	8,709	(1,970)
Net cash provided by operating activities	18,583	9,731
Cash flows from investing activities
Purchases of property and equipment	(106)	(268)
Purchases of marketable securities	(410,979)	(175,985)
Sales and maturities of marketable securities	407,485	172,527
Net cash used in investing activities	(3,600)	(3,726)
Cash flows from financing activities
Proceeds from exercise of stock options	0	125
Net cash provided by financing activities	0	125
Effect of exchange rate changes on cash, cash equivalents and restricted cash	19	22
Net change in cash, cash equivalents and restricted cash	15,002	6,152
Cash, cash equivalents and restricted cash
Beginning of period	135,498	52,590
End of period	$ 150,500	$ 58,742

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