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Commitments and Contingencies - Additional Information (Details) (USD $)	3 Months Ended		0 Months Ended	1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 15, 2014	Apr. 30, 2014	Mar. 31, 2014
Loss Contingencies [Line Items]
Capital leases expire date	Jun. 30, 2017
Rent expense	$ 800,000us-gaap_OperatingLeasesRentExpenseNet	$ 1,000,000us-gaap_OperatingLeasesRentExpenseNet
Minimum [Member]
Loss Contingencies [Line Items]
Lease interest rate	6.60%atec_CapitalLeaseInterestRate / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum [Member]
Loss Contingencies [Line Items]
Lease interest rate	9.60%atec_CapitalLeaseInterestRate / us-gaap_RangeAxis = us-gaap_MaximumMember
Orthotec LLC, Litigation Settlement [Member]
Loss Contingencies [Line Items]
Judgment assessed by court			49,000,000us-gaap_LitigationSettlementAmount / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember
Number of quarterly installments			28atec_LitigationSettlementNumberofQuarterlyInstallments / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember
Litigation settlement expense	19,700,000us-gaap_LitigationSettlementExpense / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember			15,750,000us-gaap_LitigationSettlementExpense / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember	1,750,000us-gaap_LitigationSettlementExpense / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember
Aggregate quarterly installments	19,700,000atec_LitigationSettlementAggregateQuarterlyInstallmentsAmount / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember
Litigation settlement interest, quarterly installments, amount			1,100,000atec_LitigationSettlementInterestQuarterlyInstallmentsAmount / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember
Beginning Fourth Quarter of 2014 [Member] | Orthotec LLC, Litigation Settlement [Member]
Loss Contingencies [Line Items]
Judgment assessed by court			31,500,000us-gaap_LitigationSettlementAmount / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember / atec_LitigationPaymentScheduleAxis = atec_BeginningFourthQuarterof2014Member
Litigation settlement, quarterly installments, amount			1,100,000atec_LitigationSettlementQuarterlyInstallmentsAmount / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember / atec_LitigationPaymentScheduleAxis = atec_BeginningFourthQuarterof2014Member
Litigation settlement interest rate			7.00%atec_LitigationSettlementInterestRate / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember / atec_LitigationPaymentScheduleAxis = atec_BeginningFourthQuarterof2014Member
Litigation settlement interest, quarterly installments, amount			1,100,000atec_LitigationSettlementInterestQuarterlyInstallmentsAmount / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember / atec_LitigationPaymentScheduleAxis = atec_BeginningFourthQuarterof2014Member
Final Installment [Domain] | Orthotec LLC, Litigation Settlement [Member]
Loss Contingencies [Line Items]
Number of quarterly installments			1atec_LitigationSettlementNumberofQuarterlyInstallments / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember / atec_LitigationPaymentScheduleAxis = atec_FinalInstallmentDomain
Litigation settlement, final installment amount			$ 700,000atec_LitigationSettlementFinalInstallmentAmount / us-gaap_LitigationCaseAxis = atec_OrthotecLLCLitigationSettlementMember / atec_LitigationPaymentScheduleAxis = atec_FinalInstallmentDomain

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- Definition

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+ References

No definition available.

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X

- Definition

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+ References

No definition available.

+ Details

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- Definition

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+ References

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- Definition

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- Definition

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- Definition

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- Definition

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+ References

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- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

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- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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