General form for registration of securities under the Securities Act of 1933

Consolidated Balance Sheets

v3.26.1
Consolidated Balance Sheets - USD ($)
$ in Thousands
Feb. 28, 2026
Nov. 30, 2025
Aug. 31, 2025
May 31, 2025
Feb. 28, 2025
Nov. 30, 2024
Aug. 31, 2024
May 31, 2024
May 31, 2023
Current assets:                  
Cash and cash equivalents $ 15,655     $ 11,903       $ 3,110  
Restricted cash       0       6,704  
Prepaid expenses 448     252       463  
Prepaid service fees 2,335     3,723       538  
Other receivables (Note 9)       2,000          
Total current assets 18,438     17,878       10,815  
Other non-current assets 59     169       321  
Total assets 18,497     18,047       11,136  
Current liabilities:                  
Accounts payable 13,478     14,692       29,561  
Accrued liabilities and compensation 15,825     2,206       2,810  
Accrued interest on convertible notes 11,750     18,151       15,227  
Accrued dividends on convertible preferred stock 9,375     8,269       6,791  
Convertible notes payable, net       27,200       29,793  
Total current liabilities 50,428     70,518       84,182  
Long-term liabilities:                  
Operating leases       0       141  
Other liabilities (Note 9) 43,571     43,571       43,571  
Total liabilities 122,784     114,089       127,894  
Commitments and Contingencies (Note 9)            
Stockholders' deficit:                  
Preferred stock              
Common stock, $0.001 par value; 1,750,000 shares authorized; 1,249,264 and 1,059,002 issued, and 1,248,978 and 1,058,559 outstanding at May 31, 2025 and May 31, 2024, respectively 1,358     1,249       1,059  
Treasury stock, $0.001 par value; 286 and 443 shares at May 31, 2025 and May 31, 2024, respectively            
Additional paid-in capital 814,978     790,495       773,714  
Accumulated deficit (920,623)     (887,786)       (891,531)  
Total stockholders' deficit (104,287) $ (119,747) $ (99,504) (96,042) $ (92,979) $ (89,390) $ (85,210) (116,758) $ (109,501)
Total liabilities and stockholders' deficit 18,497     18,047       11,136  
Series B Convertible Preferred Stock                  
Stockholders' deficit:                  
Preferred stock            
Series C Convertible Preferred Stock                  
Current liabilities:                  
Accrued dividends on convertible preferred stock 4,243     3,769       3,135  
Stockholders' deficit:                  
Preferred stock            
Series D Convertible Preferred Stock                  
Current liabilities:                  
Accrued dividends on convertible preferred stock 5,132     4,500       3,656  
Stockholders' deficit:                  
Preferred stock