v3.26.1
Subsequent Events (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Aug. 10, 2026
USD ($)
shares
$ / shares
Jul. 16, 2026
USD ($)
Jul. 01, 2026
USD ($)
shares
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
shares
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
shares
Jul. 08, 2026
Dec. 31, 2025
shares
Subsequent Event [Line Items]                    
Common stock, shares outstanding | shares       2,675,412 2,675,412   2,675,412     2,237,912
Common stock issuable | shares       2,675,412 2,675,412   2,675,412     2,237,912
Aggregate gross proceeds             $ 0 $ 3,000    
Stock options granted | shares         0 0 0 0    
Merger Agreement | Cortigent Holdings, Inc. | Common Stock [Member]                    
Subsequent Event [Line Items]                    
Percentage of common stock of entity     82.00%              
First Finance | Notes Payable                    
Subsequent Event [Line Items]                    
Debt Instrument, principal amount       $ 1,000 $ 1,000   $ 1,000      
Debt Instrument, accrue interest per annum       11.00% 11.00%   11.00%      
Debt Instrument, maturity on earlier       Dec. 30, 2026            
First Finance | Notes Payable | Tranche One                    
Subsequent Event [Line Items]                    
Debt Instrument, principal amount       $ 500 $ 500   $ 500      
Debt Instrument, carrying amount       500 500   500      
First Finance | Notes Payable | Tranche Two                    
Subsequent Event [Line Items]                    
Debt Instrument, principal amount       250 250   250      
First Finance | Notes Payable | Tranche Three                    
Subsequent Event [Line Items]                    
Debt Instrument, principal amount       250 250   250      
Maximum [Member] | Merger Agreement | Cortigent Holdings, Inc. | Common Stock [Member]                    
Subsequent Event [Line Items]                    
Common stock issuable | shares     855,000              
Maximum [Member] | First Finance | Notes Payable                    
Subsequent Event [Line Items]                    
Debt Instrument, principal amount       $ 1,000 $ 1,000   $ 1,000      
Subsequent Event | Merger Agreement                    
Subsequent Event [Line Items]                    
Debt instrument, convertible, conversion price | $ / shares $ 3.5                  
Exercise price of warrants | $ / shares $ 10                  
Expiry term of warrants 6 months                  
Subsequent Event | Merger Agreement | Cortigent, Inc | Vivani Medical, Inc. [Member]                    
Subsequent Event [Line Items]                    
Business combination, description of merger termination terms The Merger Agreement may be terminated by either party if the transaction has not been consummated within 180 days of July 1, 2026, subject to extension in certain circumstances, and contains a break-up fee provision.                  
Subsequent Event | Merger Agreement | Cortigent, Inc | Vivani Medical, Inc. [Member] | Common Stock [Member]                    
Subsequent Event [Line Items]                    
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares | shares     12,500,000              
Business Combination Consideration Description     Vivani will receive 12,500,000 shares of the Company's common stock (the "Consideration Shares"). No fractional shares will be issued. Fifty percent of the Consideration Shares are subject to a one-year lock-up and the remaining fifty percent to a two-year lock-up following closing, together with registration rights as set forth in the Merger Agreement.              
Common stock, shares outstanding | shares     2,675,412              
Subsequent Event | Merger Agreement | Cortigent Holdings, Inc. | Vivani Medical, Inc. [Member]                    
Subsequent Event [Line Items]                    
Subsidiary, ownership percentage                 59.40%  
Subsequent Event | Merger Agreement | Cortigent Holdings, Inc. | Vivani Medical, Inc. [Member]                    
Subsequent Event [Line Items]                    
Subsidiary, voting percentage                 67.50%  
Subsequent Event | First Finance | Notes Payable                    
Subsequent Event [Line Items]                    
Debt Instrument, carrying amount   $ 1,000                
Debt Instrument, accrue interest per annum   11.00%                
Debt Instrument, maturity on earlier   Dec. 30, 2026                
Subsequent Event | First Finance | Notes Payable | Tranche One                    
Subsequent Event [Line Items]                    
Debt Instrument, carrying amount   $ 250                
Subsequent Event | First Finance | Notes Payable | Tranche Two                    
Subsequent Event [Line Items]                    
Debt Instrument, carrying amount   250                
Subsequent Event | First Finance | Notes Payable | Tranche Three                    
Subsequent Event [Line Items]                    
Debt Instrument, carrying amount   250                
Subsequent Event | First Finance | Notes Payable | Tranche Two And Three                    
Subsequent Event [Line Items]                    
Debt Instrument, carrying amount   $ 500                
Subsequent Event | ThinkEquity LLC | Merger Agreement                    
Subsequent Event [Line Items]                    
Merger financial advisory fee $ 1,875                  
Subsequent Event | Maximum [Member] | Merger Agreement                    
Subsequent Event [Line Items]                    
Debt Instrument, Convertible, Number of Equity Instruments | shares 4,285,714                  
Aggregate gross proceeds $ 15,000   $ 15,000              
Subsequent Event | Maximum [Member] | Merger Agreement | Cortigent, Inc                    
Subsequent Event [Line Items]                    
Stock options granted | shares 1,400,000                  
Subsequent Event | Minimum [Member] | Merger Agreement                    
Subsequent Event [Line Items]                    
Debt Instrument, Convertible, Number of Equity Instruments | shares 2,857,142                  
Aggregate gross proceeds $ 10,000   $ 10,000              
Common stock voting percentage 50.1%