Quarterly report pursuant to Section 13 or 15(d)

Public Offering of Common Stock (Details)

v2.4.1.9
Public Offering of Common Stock (Details) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended
Feb. 13, 2015
Feb. 05, 2015
Mar. 31, 2015
Feb. 13, 2015
Feb. 05, 2015
Dec. 31, 2014
Public Offering of Common Stock            
Offering, issuance and sale of common shares under Underwriting Agreement         4,728,000axgn_OfferingIssuanceAndSaleOfCommonSharesUnderUnderwritingAgreement  
Par value of common stock     $ 0.01us-gaap_CommonStockParOrStatedValuePerShare   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Shares of common stock sold     24,926,014us-gaap_CommonStockSharesIssued 5,437,200us-gaap_CommonStockSharesIssued   19,488,814us-gaap_CommonStockSharesIssued
Public offering price (in dollars per share)       $ 2.75us-gaap_SharePrice $ 2.75us-gaap_SharePrice  
Number of days to underwriter to sell additional common shares   30 days        
Additional Common Shares to cover over-allotments   709,200axgn_AdditionalCommonSharesToCoverOverAllotments        
Gross proceeds from issuance of common stock $ 15.0axgn_ProceedsFromIssuanceOfCommonStockGross          
Underwriting discounts, commissions and other estimated offering expenses $ 1.4us-gaap_ExpenseRelatedToDistributionOrServicingAndUnderwritingFees