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LETTERS OF CREDIT (Details) (USD $)
Mar. 31, 2015
Mar. 31, 2014
Credit facilities    
Long-term restricted cash, as determined by the expiration date of the underlying letters of credit $ 208,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent $ 313,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
Standby letters of credit    
Credit facilities    
Outstanding Amount 11,855,000us-gaap_LettersOfCreditOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
 
Restricted cash balance 6,401,000us-gaap_RestrictedCashAndCashEquivalents
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
 
Long-term restricted cash, as determined by the expiration date of the underlying letters of credit $ 208,000us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
 
Standby letters of credit | Minimum    
Credit facilities    
Percentage of outstanding amount that is cash secured 52.00%asei_LettersOfCreditCashSecuredAmountAsPercentageOfOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Standby letters of credit | Maximum    
Credit facilities    
Percentage of outstanding amount that is cash secured 76.00%asei_LettersOfCreditCashSecuredAmountAsPercentageOfOutstandingAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_StandbyLettersOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember