CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows provided by (used in) operating activities:
Net income	$ 3,257	$ 7,377
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	421	389
Stock-based compensation	1,932	1,582
Net loss on investment in marketable securities	3,644	0
Net loss on derivative instruments	2,728	0
Deferred income taxes	(124)	280
Foreign currency remeasurement gains	139	32
Shares issued to an employee in lieu of cash compensation	84	0
Other	5	45
Changes in operating assets and liabilities:
Accounts and other receivables	47	(694)
Prepaid expenses and other current assets	3,882	667
Long-term deposits	5,072	(60)
Other assets	997	1,408
Accounts payable	74	(7)
Accrued compensation	570	640
Other current liabilities	(872)	610
Deferred revenue	(2,542)	(2,476)
Other long-term liabilities	(675)	(739)
Net cash provided by operating activities	18,639	9,054
Cash flows provided by (used in) investing activities:
Purchases of marketable securities	(71,959)	0
Proceeds from sale or maturities of marketable securities and other investments	64,876	0
Proceeds from sale of derivative instruments	9,272	0
Payments for settlement of derivative instruments	(8,903)	0
Purchases of property and equipment	(8)	(88)
Net cash used in investing activities	(6,722)	(88)
Cash flows provided by (used in) financing activities:
Payment for purchases of treasury stock	(6,056)	0
Proceeds from issuance of common stock, net of issuance costs	5	35,833
Proceeds from issuance of common stock under employee stock purchase plan	34	89
Proceeds from stock options exercises	0	2,864
Net cash provided by (used in) financing activities	(6,017)	38,786
Net increase in cash and cash equivalents	5,900	47,752
Cash and cash equivalents:
Beginning of period	51,490	59,522
End of period	57,390	107,274
Supplemental disclosure of cash flow information:
Cash paid for income taxes	647	13
Supplemental disclosure of non-cash investing, and financing activities:
Release of restricted stock units and awards under company stock plan	1,557	4,016
Leased assets obtained in exchange for new operating lease liabilities	$ 120	$ 0