CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 36,767	$ 51,490
Investments - current	96,779	86,431
Accounts and other receivables	3,343	1,970
Prepaid expenses and other current assets	7,731	13,432
Total current assets	144,620	153,323
Property and equipment, net	362	444
Investments - noncurrent	18,520	7,286
Long-term deposits	4,425	9,658
Other assets	3,290	4,809
Total assets	171,217	175,520
Current liabilities:
Accounts payable	14	2
Accrued compensation	1,270	555
Deferred revenue - current	4,763	4,826
Other current liabilities	7,729	11,247
Total current liabilities	13,776	16,630
Deferred revenue - noncurrent	13,808	16,699
Other long-term liabilities	479	896
Total liabilities	28,063	34,225
Commitments and contingencies (Note 5)
Stockholders’ equity:
Common stock and additional paid-in capital	326,097	323,296
Accumulated other comprehensive income (loss)	(57)	412
Accumulated deficit	(89,718)	(100,680)
Treasury stock	(93,168)	(81,733)
Total stockholders’ equity	143,154	141,295
Total liabilities and stockholders’ equity	$ 171,217	$ 175,520