DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Policies)	9 Months Ended
	Sep. 30, 2022
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial statements and with the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the unaudited financial statements include all the normal recurring adjustments that are necessary for a fair presentation of the financial position, results of operations and cash flows for the periods presented. These condensed consolidated financial statements should be read together with the audited consolidated financial statements and notes thereto contained in Eterna’s Annual Report on Form 10-K/A for the year ended December 31, 2021 filed with the Securities and Exchange Commission (the “SEC”) on June 30, 2022 (the “10-K/A”). The accompanying condensed consolidated balance sheet as of December 31, 2021 has been derived from the audited financial statements contained in the 10-K/A but does not include all of the information and footnotes required by GAAP for complete financial statements. The results of operations for the three and nine months ended September 30, 2022 are not necessarily indicative of the results to be anticipated for the entire year ending December 31, 2022, or any other period.
Reverse Stock Split	Reverse Stock Split As approved by the Company’s stockholders at the Company’s Annual Meeting of Stockholders held on September 21, 2022, the Company effected a reverse stock split of its common stock at a ratio of 1-for-20, as determined by the Company’s Board of Directors within the parameters approved by the Company’s stockholders (the “Reverse Stock Split”). The Reverse Stock Split became effective under Delaware law at 11:59 p.m. Eastern time on October 16, 2022. Upon the effectiveness of the Reverse Stock Split, every twenty shares of the issued and outstanding common stock were automatically combined and reclassified into one issued and outstanding share of common stock. The Reverse Stock Split did not affect any stockholder’s ownership percentage of the common stock, alter the par value of the common stock or modify any voting rights or other terms of the common stock. The number of authorized shares of common stock under the Charter remains unchanged. No fractional shares were issued in connection with the Reverse Stock Split. In lieu of any fractional shares to which a stockholder would otherwise be entitled, the Company paid an amount of cash equal to the product of (i) the fractional share to which the holder would otherwise be entitled and (ii) the then fair value of a share as determined in good faith by the Board. The Company paid an aggregate of $719 for a total of 175 fractional shares. All share and per share data in this Quarterly Report on Form 10-Q have been adjusted for all periods presented to reflect the Reverse Stock Split.
Reclassifications	Reclassifications Certain reclassifications have been made to Eterna’s prior years’ financial statements to conform to the current year presentation. These reclassifications had no effect on Eterna’s previously reported results of operations or accumulated deficit.