Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 39,933	$ 85,388
Short-term marketable securities	297,218	284,522
Accounts receivable	8,173	8,614
Prepaid expenses and other current assets	13,245	13,263
Income tax receivable	31,734	31,004
Total current assets	390,303	422,791
Property and equipment, net	12,119	11,919
Operating lease, right-of-use assets	21,344	22,794
Restricted cash	3,968	3,968
Other long-term assets	765	803
Total assets	428,499	462,275
Current liabilities:
Accounts payable	9,326	4,097
Accrued expenses and other current liabilities	11,603	18,339
Liability related to the sale of future royalties	36,512	35,076
Operating lease liabilities	4,966	5,275
Total current liabilities	62,407	62,787
Liability related to the sale of future royalties, net of current portion	151,612	159,429
Operating lease liabilities, net of current portion	20,524	21,238
Series 1 nonconvertible preferred stock	1,423	1,423
Other long-term liabilities	649	663
Total liabilities	236,615	245,540
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock; $0.01 par value per share, 100,000 shares authorized; 21,156 and 21,059 shares issued and outstanding at December 31, 2023 and September 30, 2023, respectively	212	211
Additional paid-in capital	432,608	424,693
Accumulated other comprehensive loss	(534)	(1,174)
Accumulated deficit	(240,402)	(206,995)
Total stockholders' equity	191,884	216,735	$ 300,837
Total liabilities and stockholders' equity	$ 428,499	$ 462,275