CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows provided by (used in) operating activities:
Net Income (Loss)	$ 33,976	$ 30,664
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Depreciation of property and equipment	67	140
Reduction in carrying value of right of use assets	324	672
Stock-based compensation	3,395	3,417
Net (gain) loss on investment in marketable securities	(12,153)	7,884
Net gains on derivative instruments	(4,645)	(4,831)
Foreign currency remeasurement (gains) losses	(43)	145
Deferred income taxes	3,528	(5,101)
Shares issued to an employee in lieu of cash compensation	595	157
Other noncash	(262)	23
Changes in operating assets and liabilities:
Accounts and other receivables	(1,006)	735
Prepaid expenses and other current assets	(500)	4,085
Long-term deposits	(1,850)	5,196
Other assets	446	1,226
Accounts payable	(41)	84
Accrued compensation	1,098	1,474
Other current liabilities	(1,035)	(3,196)
Deferred revenue	(4,766)	(4,130)
Other long-term liabilities	3,472	1,502
Net cash and cash equivalents provided by operating activities	20,600	40,146
Cash flows provided by (used in) investing activities:
Purchases of marketable securities and other investments	(177,331)	(151,306)
Proceeds from sale or maturities of marketable securities and other investments	171,804	119,714
Proceeds from sale of derivative instruments	21,944	16,265
Payments for settlement of derivative instruments	(13,019)	(14,052)
Other investing activities	0	(26)
Net cash and cash equivalents provided by (used in) investing activities	3,398	(29,405)
Cash flows provided by (used in) financing activities:
Dividends payments to stockholders	(7,409)	0
Payment for purchases of treasury stock	(8,264)	(13,238)
Shares withheld to cover payroll taxes	(1,240)	(229)
Proceeds from stock options exercises	160	0
Other financing activities	6	56
Net cash and cash equivalents used in financing activities	(16,747)	(13,411)
Net decrease in cash and cash equivalents	7,251	(2,670)
Cash and cash equivalents:
Beginning of period	48,820	51,490
End of period	56,071	48,820
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1,794	1,408
Supplemental disclosure of non-cash investing, and financing activities:
Dividends declared but not yet paid	1,490	4,212
Leased assets obtained in exchange for new operating lease liabilities	$ 0	$ 120