CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows provided by (used in) operating activities:
Net income	$ 18,655	$ 8,278
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Depreciation of property and equipment	18	21
Reduction in carrying value of right of use assets	36	151
Stock-based compensation	1,077	946
Net gains on investment in marketable securities	(2,690)	(3,683)
Net gain on derivative instruments	(2,600)	(615)
Foreign currency remeasurement loss	49	0
Shares issued to an employee in lieu of cash compensation	553	385
Other noncash	(182)	(26)
Changes in operating assets and liabilities:
Accounts and other receivables	(186)	(501)
Prepaid expenses and other current assets	1,146	383
Long-term deposits	(210)	18
Other assets	109	113
Accounts payable	(27)	(68)
Accrued compensation	60	(1,259)
Other current liabilities	6,191	602
Deferred revenue	7,898	(1,189)
Other long-term liabilities	0	(33)
Net cash and cash equivalents provided by operating activities	29,897	3,523
Cash flows provided by (used in) investing activities:
Purchases of marketable securities and other investments	(40,913)	(54,954)
Proceeds from sale or maturities of marketable securities and other investments	48,707	30,771
Proceeds from sale of derivative instruments	3,853	5,844
Payments for settlement of derivative instruments	(4,771)	(1,369)
Net cash and cash equivalents provided by (used in) investing activities	6,876	(19,708)
Cash flows provided by (used in) financing activities:
Dividend payments to stockholders	(1,490)	(4,400)
Shares withheld to cover payroll taxes	(257)	(757)
Other financing activities	0	6
Net cash and cash equivalents used in financing activities	(1,747)	(5,151)
Net increase (decrease) in cash and cash equivalents	35,026	(21,336)
Cash and cash equivalents:
Beginning of period	56,071	48,820
End of period	91,097	27,484
Supplemental disclosure of cash flow information:
Cash paid for income taxes	32	19
Supplemental disclosure of non-cash investing, and financing activities:
Dividends declared but not yet paid	$ 1,502	$ 1,015