XML 52 R26.htm IDEA: XBRL DOCUMENT v2.4.1.9
Short-term Investments (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Short Term Investment [Line Items]  
Adjusted Cost $ 35,580us-gaap_AvailableForSaleSecuritiesAmortizedCost
Gross Gain 0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax [1]
Gross Loss   
Service Fee 0astc_AvailableForSaleSecuritiesServicesFee [1]
Fair Value 35,580astc_ShortTermInvestmentsFairValue
Mutual Funds  
Short Term Investment [Line Items]  
Adjusted Cost 35,580us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= astc_MutualFundsMember
Gross Gain 0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentTypeAxis
= astc_MutualFundsMember		 [1]
Gross Loss   
Service Fee 0astc_AvailableForSaleSecuritiesServicesFee
/ us-gaap_InvestmentTypeAxis
= astc_MutualFundsMember		 [1]
Fair Value $ 35,580astc_ShortTermInvestmentsFairValue
/ us-gaap_InvestmentTypeAxis
= astc_MutualFundsMember
[1] Items denoted with * are less than one thousand.