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The Company and Basis of Presentation - Additional Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2015 Market	Dec. 31, 2014
Accounting Policies [Abstract]
Number of market for products (more than)	50atec_NumberOfMarketProductsSold
Cash	$ 11,400,000us-gaap_Cash	$ 19,735,000us-gaap_Cash
Anticipated cash flow from operations and other working capital, excluding common stock warrant liabilities	$ 43,200,000atec_AnticipatedCashFlowFromOperationsInCurrentFiscalYearAndOtherWorkingCapitalExcludingCommonStockWarrantLiabilities

X

- Definition

Anticipated Cash Flow From Operations In Current Fiscal Year And Other Working Capital Excluding Common Stock Warrant Liabilities

+ References

No definition available.

+ Details

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- Definition

Number Of Market Products Sold

+ References

No definition available.

+ Details

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Namespace Prefix:	atec_
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Balance Type:	na
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- Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
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X

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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