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Segment and Geographical Information - Schedule of Revenues Attributed to Geographic Location of Customer (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Total consolidated revenues	$ 48,647us-gaap_Revenues	$ 49,173us-gaap_Revenues
Japan [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total consolidated revenues	7,600us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_JP	7,700us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_JP
Reportable Geographical Components [Member] | United States [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total consolidated revenues	30,467us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US	32,050us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = country_US
Reportable Geographical Components [Member] | International [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total consolidated revenues	$ 18,180us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = atec_InternationalMember	$ 17,123us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_ReportableGeographicalComponentsMember / us-gaap_StatementGeographicalAxis = atec_InternationalMember

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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- Details

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- Details

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Namespace Prefix:
Data Type:	na
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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: