CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows provided by (used in) operating activities:
Net income	$ 10,962	$ 11,148
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Depreciation of property and equipment	95	75
Reduction in carrying value of right of use assets	524	500
Stock-based compensation	2,661	1,997
Net (gain) loss on investment in marketable securities	13,288	(490)
Net (gain) on derivative instruments	(3,393)	0
Foreign currency remeasurement losses	161	612
Shares issued to an employee in lieu of cash compensation	84	0
Shares withheld to cover payroll taxes	154	0
Other	(29)	68
Changes in operating assets and liabilities:
Accounts and other receivables	(1,373)	(1,953)
Prepaid expenses and other current assets	5,702	870
Long-term deposits	1,114	33
Other assets	5,084	2,097
Accounts payable	16	(30)
Accrued compensation	715	(272)
Other current liabilities	527	917
Deferred revenue	(2,954)	(3,734)
Other long-term liabilities	(950)	(1,116)
Net cash and cash equivalents provided by operating activities	32,080	10,722
Cash flows provided by (used in) investing activities:
Purchases of marketable securities and other investments	131,100	34,443
Proceeds from sale or maturities of marketable securities and other investments	95,225	0
Proceeds from sale of derivative instruments	11,170	1,757
Payments for settlement of derivative instruments	(10,844)	0
Purchases of property and equipment	(29)	(89)
Net cash and cash equivalents used in investing activities	(35,578)	(32,775)
Cash flows provided by (used in) financing activities:
Payment for purchases of treasury stock	(11,281)	0
Proceeds from issuance of common stock, net of issuance costs	5	50,118
Proceeds from issuance of common stock under employee stock purchase plan	51	150
Proceeds from stock options exercises	0	2,864
Net cash and cash equivalents provided by (used in) financing activities	(11,225)	53,132
Net increase (decrease) in cash and cash equivalents	(14,723)	31,079
Cash and cash equivalents:
Beginning of period	51,490	59,522
End of period	36,767	90,601
Supplemental disclosure of cash flow information:
Cash paid for income taxes	662	88
Supplemental disclosure of non-cash investing, and financing activities:
Release of restricted stock units and awards under company stock plan	1,836	4,081
Leased assets obtained in exchange for new operating lease liabilities	$ 120	$ 0