Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Share capital - issued share capital of Arqit Limited (Details)

v3.21.2
Share capital - issued share capital of Arqit Limited (Details)
12 Months Ended
Sep. 02, 2021
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2021
EUR (€)
shares
Apr. 25, 2021
$ / shares
Sep. 30, 2020
USD ($)
shares
Sep. 30, 2020
EUR (€)
€ / shares
shares
Sep. 30, 2019
USD ($)
Disclosure of classes of share capital [line items]              
Number of ordinary shares 12,973,270 110,073,430          
Par value per share | (per share) $ 0.0001 $ 0.0001   $ 1   € 0.0001  
Increase in share premium | $ $ 70,999,290            
At 1 October 2020 - par value 0.0001 12,973,270 110,073,430          
Share capital   $ 11,007     $ 158 € 129 $ 158
Conversion of convertible loan notes   98 € 71        
Exchanged for shares in the Company in reverse acquisition   $ 256 200        
Distribution of amount to holders for holding of deferred shares on winding up | €     € 1.00        
Ordinary shares              
Disclosure of classes of share capital [line items]              
Number of ordinary shares         1,286,600 1,286,600  
At 1 October 2020 - par value 0.0001         1,286,600 1,286,600  
Conversion of convertible loan notes   710,074 710,074        
Deferred shares issued   (42,500) (42,500)        
Exchanged for shares in the Company in reverse acquisition   1,954,174 1,954,174        
Deferred shares              
Disclosure of classes of share capital [line items]              
Deferred shares issued   42,500 42,500        
Exchanged for shares in the Company in reverse acquisition   42,500 42,500        
Private placement              
Disclosure of classes of share capital [line items]              
Number of ordinary shares 7,100,000            
At 1 October 2020 - par value 0.0001 7,100,000