Note 15 - Subsequent Event (Details Textual) - Subsequent Event [Member] $ in Millions	Jul. 01, 2022 USD ($)
Business Acquisition, Exclusive Right to Negotiate Fee	$ 2.7
Business Acquisition, Equity Interest Issued or Issuable, Fee to Acquire Preferred Stock Equity Interest	$ 2.0
Business Acquisition, Equity Interest Issued or Issuable, Preferred Stock Equity Interest	19.99%

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

No definition available.

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