Prepaid Expenses and Other Current Assets (Details) - Schedule of prepaid expenses and other current assets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of prepaid expenses and other current assets [Abstract]
Australia research and development credit receivable	$ 1,212	$ 2,148
CRO prepayments	693	1,211
Metals to be used in research and development	1,691	31
Directors & Officers Insurance	934
Other	202	112
Total	$ 4,732	$ 3,502

Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_PrepaidExpenseCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant