Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals)	3 Months Ended
Mar. 31, 2021 USD ($)
Issuance costs	$ 5,493,310

Represents the amount of issuance costs recognized in connection with the issuance of common stock associated with warrants (along with such warrants) during the period.

No definition available.

Name:	atos_IssuanceOfCommonStockAndWarrantsIssuanceCosts
Namespace Prefix:	atos_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration