Name:	atec_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityChangeInFairValueMeasurementEquityAward
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Fair value measurement with unobservable inputs reconciliation recurring basis liability change in fair value measurement milestone.

No definition available.

Name:	atec_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityChangeInFairValueMeasurementMilestone
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Data Type:	xbrli:monetaryItemType
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Fair value measurement with unobservable inputs reconciliation recurring basis liability straight line recognition of lability classified equity award.

No definition available.

Name:	atec_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityStraightLineRecognitionOfLabilityClassifiedEquityAward
Namespace Prefix:	atec_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258