Note 17 - Subsequent Event (Details Textual) - Subsequent Event [Member] $ in Millions	Nov. 01, 2022 USD ($)
Business Acquisition, Fee to Acquire Preferred Stock Equity Interest	$ 2
Business Acquisition, Percentage of Voting Interests to be Acquired	19.99%

Represents the fee planned in order to acquire a fixed-percentage preferred stock equity interest in the target company.

No definition available.

Name:	atos_BusinessAcquisitionFeeToAcquirePreferredStockEquityInterest
Namespace Prefix:	atos_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant