Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands |
Aug. 31, 2025 |
May 31, 2025 |
May 31, 2024 |
|---|---|---|---|
| Summary of Significant Accounting Policies | |||
| Accumulated deficit | $ (893,326) | $ (887,786) | $ (891,531) |
| Money market fund value | 11,400 | 0 | |
| Balance in excess of federally insured limits | 11,700 | 2,900 | |
| Restricted cash, uninsured amount | 6,700 | ||
| Restricted cash | $ 0 | $ 6,704 |
| X | ||||||||||
- Definition The amount of restricted cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available.
|
| X | ||||||||||
- Definition Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. No definition available.
|
| X | ||||||||||
- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of accumulated undistributed earnings (deficit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|