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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023
Common stock, offering costs	$ 307	$ 2,489

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- Definition

Common stock offering costs.

+ References

No definition available.

+ Details

Name:	atec_CommonStockOfferingCosts
Namespace Prefix:	atec_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration