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SUBSEQUENT EVENTS (Details Textual) (Aspire Capital Fund, Llc [Member], Subsequent Event [Member], USD $)
3 Months Ended
Mar. 27, 2015
Aspire Capital Fund, Llc [Member] | Subsequent Event [Member]
 
Stock Issued During Period, Shares, New Issues 832,066us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ dei_LegalEntityAxis
= atos_AspireCapitalFundLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Proceeds from Issuance of Common Stock $ 1,539,367us-gaap_ProceedsFromIssuanceOfCommonStock
/ dei_LegalEntityAxis
= atos_AspireCapitalFundLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember