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LONG-TERM DEBT (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]      
Long-term Debt, Description payable in 36 to 84 fully amortizing monthly installments, mature between December 2015 and November 2021    
Long-term Debt $ 10,724,000us-gaap_LongTermDebt    
Proceeds from Notes Payable 1,000,000us-gaap_ProceedsFromNotesPayable 0us-gaap_ProceedsFromNotesPayable 0us-gaap_ProceedsFromNotesPayable
Fair Value Of Warrants Issued With Promissory Notes 145,000ams_FairValueOfWarrantsIssuedWithPromissoryNotes 0ams_FairValueOfWarrantsIssuedWithPromissoryNotes 0ams_FairValueOfWarrantsIssuedWithPromissoryNotes
Maximum [Member]      
Debt Instrument [Line Items]      
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 7.48%us-gaap_LongTermDebtPercentageBearingVariableInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Minimum [Member]      
Debt Instrument [Line Items]      
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 3.95%us-gaap_LongTermDebtPercentageBearingVariableInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Eleven Notes [Member]      
Debt Instrument [Line Items]      
Long-term Debt   15,544,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ams_ElevenNotesMember
 
Eight Notes [Member]      
Debt Instrument [Line Items]      
Long-term Debt $ 9,724,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= ams_EightNotesMember