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Note 8 - Preferred Stock (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Nov. 20, 2014
Dec. 31, 2013
Note 8 - Preferred Stock (Details) [Line Items]      
Preferred Stock, Shares Authorized 10,000,000us-gaap_PreferredStockSharesAuthorized    
Convertible Preferred Stock, Shares Issued upon Conversion   3,262,000us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion  
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)   $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare  
Dividends, Preferred Stock (in Dollars) $ 28,881us-gaap_DividendsPreferredStock    
Series 2010-A [Member]      
Note 8 - Preferred Stock (Details) [Line Items]      
Preferred Stock, Shares Authorized 10,000us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= amar_Series2010AMember
   
Preferred Stock, Dividend Rate, Percentage 10.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_StatementClassOfStockAxis
= amar_Series2010AMember
   
Convertible Preferred Stock, Shares Issued upon Conversion 1,000us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_StatementClassOfStockAxis
= amar_Series2010AMember
   
Preferred Stock, Par or Stated Value Per Share (in Dollars per share) $ 100us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= amar_Series2010AMember
   
Preferred Stock, Liquidation Preference Per Share (in Dollars per share) $ 0.10us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= amar_Series2010AMember
   
Preferred Stock, Dividends, Per Share, Cash Paid (in Dollars per share) $ 0.10us-gaap_PreferredStockDividendsPerShareCashPaid
/ us-gaap_StatementClassOfStockAxis
= amar_Series2010AMember
   
Convertible Preferred Stock [Member]      
Note 8 - Preferred Stock (Details) [Line Items]      
Preferred Stock, Shares Outstanding   3,262us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
 
Series 2010-A Convertible Preferred Stock [Member]      
Note 8 - Preferred Stock (Details) [Line Items]      
Preferred Stock, Shares Issued     0us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= amar_Series2010AConvertiblePreferredStockMember
Preferred Equity to Common Equity [Member]      
Note 8 - Preferred Stock (Details) [Line Items]      
Convertible Preferred Stock, Shares Issued upon Conversion   171,684us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_ConversionOfStockByUniqueDescriptionAxis
= amar_PreferredEquityToCommonEquityMember