CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 85,521	$ 56,071
Investments - current	92,848	104,291
Accounts and other receivables, net	3,138	2,241
Prepaid expenses and other current assets	9,101	9,847
Total current assets	190,608	172,450
Property and equipment, net	164	211
Investments - noncurrent	46,545	33,350
Long-term deposits	6,324	6,231
Deferred tax assets	2,793	3,343
Other assets	87	146
Total assets	246,521	215,731
Current liabilities:
Accounts payable	55	47
Accrued compensation	4,003	3,127
Deferred revenue - current	12,494	4,239
Other current liabilities	13,654	11,900
Total current liabilities	30,206	19,313
Deferred revenue - noncurrent	7,978	8,390
Other long-term liabilities	7,107	4,926
Total liabilities	45,291	32,629
Commitments and contingencies (Note 5)
Stockholders’ equity:
Common stock – $0.001 par value; 100,000,000 shares authorized; 48,047,329 and 47,636,273 shares issued, respectively; 31,854,837 and 31,528,977 shares outstanding, respectively	48	48
Additional paid-in capital	322,786	322,134
Accumulated other comprehensive income	2,019	1,702
Accumulated deficit	(18,263)	(36,040)
Treasury stock at cost: 16,192,492 and 16,107,296 shares, respectively)	(105,360)	(104,742)
Total stockholders’ equity	201,230	183,102
Total liabilities and stockholders’ equity	$ 246,521	$ 215,731