Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended
Mar. 31, 2022
Maximum
Significant Accounting Policies [Line Items]
Percentage of revenue from other distinct performance obligations of total revenue	10.00%

Percentage of revenue from other distinct performance obligations of revenue.

No definition available.

Name:	atec_PercentageOfRevenueFromOtherDistinctPerformanceObligationsOfRevenue
Namespace Prefix:	atec_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration