CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 142,018	$ 192,908
Investments available for sale	27,254	28,348
Accounts receivables	17	8
Prepaid income tax	0	2,905
Prepaid expenses and other current assets	203	263
Total current assets	169,492	224,432
Prepaid expenses and other assets	1,056	1,301
Property and equipment, net	18	11
Deferred tax asset	19,278	9,049
Total assets	189,844	234,793
Current liabilities:
Accounts payable and accrued liabilities	338	654
Accrued payroll and related expenses	270	220
Accrued licensing costs	355	9,438
Other liabilities, current	58	44
Total current liabilities	1,021	10,356
Other liabilities	46	0
Total liabilities	1,067	10,356
Commitments and contingencies (Note 4)
Stockholders' equity:
Preferred stock, par value $0.0001 per share Authorized: 10,000,000 shares at December 31, 2021 and December 31, 2020, Issued and outstanding: 0 shares at December 31, 2021 and December 31, 2020	0	0
Common stock, par value $0.0001 per share Authorized: 100,000,000 shares at December 31, 2021 and December 31, 2020, Issued and outstanding: 71,232,856 shares and 71,058,570 shares, at December 31, 2021 and December 31, 2020, respectively	7	7
Additional paid-in capital	236,445	232,457
Accumulated deficit	(47,607)	(8,014)
Accumulated other comprehensive loss	(68)	(13)
Total stockholders' equity	188,777	224,437
Total liabilities and stockholders' equity	$ 189,844	$ 234,793