Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 50,768	$ 143,745
Short-term investments	63,999	22,742
Accounts receivable	0	71
Prepaid expenses and other current assets	5,613	2,609
Total current assets	120,380	169,167
Long-term investments	0	16,210
Property and equipment, net	12,280	6,601
Right-of-use assets, net	26,607	13,168
Intangible assets, net	9,611	10,624
Goodwill	4,508	4,508
Other long-term assets	1,923	890
Total assets	175,309	221,168
Current liabilities:
Accounts payable	7,916	3,872
Current portion of operating lease liability	2,149	1,011
Current portion of liability related to sale of future royalties	1,331	836
Other accrued liabilities	10,344	5,064
Total current liabilities	21,740	10,783
Operating lease liability, net of current portion	20,019	11,997
Liability related to sale of future royalties, net of current portion	11,027	10,686
Other long-term liabilities	216	171
Total liabilities	53,002	33,637
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock: $0.0001 par value; 5,000,000 shares authorized; none issued and outstanding as of September 30, 2022 and December 31, 2021	0	0
Common stock: $0.0001 par value; 250,000,000 shares authorized; 128,331,408 and 125,594,393 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively	13	13
Additional paid-in capital	426,003	406,943
Accumulated deficit	(303,191)	(219,351)
Accumulated other comprehensive loss	(518)	(74)
Total stockholders’ equity	122,307	187,531
Total liabilities and stockholders’ equity	$ 175,309	$ 221,168