CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 12,484	$ 5,401
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	762	1,931
Stock-based compensation	2,338	4,756
Marketable Securities, Gain (Loss)	(479)	0
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	1,364	0
Foreign currency remeasurement gains (losses)	635	(427)
Deferred income taxes	531	(2,483)
Asset impairment charges	2,166	0
Impairment of right-of-use lease asset	32	271
Other	(9)	127
Changes in operating assets and liabilities:
Accounts and other receivables	248	1,167
Prepaid expenses and other current assets	(823)	1,486
Long-term deposits	110	(5,077)
Other assets	2,952	2,194
Accounts payable	(148)	(660)
Accrued compensation	(446)	(1,843)
Other current liabilities	2,205	(1,253)
Deferred revenue	(4,982)	(4,137)
Other long-term liabilities	(1,491)	(1,431)
Net cash provided by operating activities	17,449	22
Cash flows provided by (used in) investing activities:
Payments to Acquire Marketable Securities	(109,408)	0
Proceeds from Sale and Maturity of Marketable Securities	17,156	3,000
Proceeds from Derivative Instrument, Investing Activities	18,919	0
Payments for Derivative Instrument, Investing Activities	(14,016)	0
Purchases of property and equipment	(335)	(47)
Net cash provided by (used in) investing activities	(87,684)	2,953
Cash flows provided by (used in) financing activities:
Proceeds from issuance of common stock	59,189	0
Proceeds from issuance of common stock under employee stock purchase plan	150	134
Proceeds from stock options exercises	2,864	577
Cash paid for purchases of treasury stock	0	(30,642)
Net cash provided by (used in) financing activities	62,203	(29,931)
Cash and Cash Equivalents, Period Increase (Decrease)	(8,032)	(26,956)
Cash and cash equivalents:
Beginning of year	59,522	86,478
End of year	51,490	59,522
Cash and cash equivalents:
Beginning of year	88	65
End of year
Stock Issued	4,278	3,016
Leased assets obtained in exchange for new operating lease liabilities	$ 0	$ 577