Transition report pursuant to Rule 13a-10 or 15d-10

Transition Period Comparative Data (Details) - Schedule of statements of cash flows

Transition Period Comparative Data (Details) - Schedule of statements of cash flows - Transition Period Comparative Data [Member] - USD ($)
9 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 31, 2021
Net loss $ (16,487) $ (20,082)  
Adjustments to reconcile net loss to net cash used in operating activities:      
Stock-based compensation 8,458 10,663  
Issuance of common stock to consultants 244 302  
Depreciation and amortization 225 57  
(Gain) loss on extinguishment of debt (7) 453  
Gain on forgiveness of PPP loan (431)    
Loss on exchange of notes payable for common stock and warrants 1,521  
Amortization of debt discount 2,256  
Non-cash expenses for placement agent 55  
Change in fair value of warrant liability 1,337  
Change in fair value of derivative liability (39)  
Changes in operating assets and liabilities:      
Prepaid and other assets (500) (189)  
Account payable (126) 120  
Accrued expenses 87 (408)  
Accrued interest 349  
Net cash used in operating activities (8,537) (3,605)  
Purchase of equipment (552) (82)  
Purchase of patents/R&D license (264) (25)  
Net cash used in investing activities (816) (107)  
Proceeds from the issuance of common stock, net of fees 1,599  
Proceeds from the exercise of stock options 186  
Proceeds from related parties non-interest bearing advance 25  
Repayment of senior secured promissory note (200)  
Proceeds from PPP loan 205  
Repayment of related party non interest bearing advance (50)  
Repayment of notes payable (53)  
Proceeds from issuance of senior secured convertible notes and common stock warrants 2,676  
Common stock repurchased and subsequently canceled (450)  
Payment of financing costs (52)  
Net cash provided by financing activities 186 3,700  
Net decrease in cash (9,167) (12)  
Cash — beginning of year 15,297 48 $ 48
Cash — end of year 6,130 36 $ 15,297
Unpaid research and development license included in accounts payable 75  
Beneficial conversion feature in connection with notes payable 619  
Issuance of common stock in connection with conversion of notes 4,494  
Issuance of common stock in connection of notes payable 1,134  
Issuance of common stock in satisfaction of accounts payable 122  
Reclassification of warrant liabilities 2,061  
Issuance of common stock warrants 263  
Unpaid equipment included in accounts payable 206  
Cash paid for interest 6 60  
Cash paid income taxes