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Fair Value Measurements - Assets Subject to Fair Value Measurements (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Mar. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Current marketable securities - available for sale $ 210us-gaap_AvailableForSaleSecuritiesCurrent  
Marketable Securities [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Current marketable securities - available for sale 210us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_FairValueByAssetClassAxis
= adat_MarketableSecuritiesMember		  
Level 1 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Current marketable securities - available for sale 210us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
Level 1 [Member] | Marketable Securities [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Current marketable securities - available for sale 210us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_FairValueByAssetClassAxis
= adat_MarketableSecuritiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
Level 2 [Member] | Marketable Securities [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Current marketable securities - available for sale     
Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Current marketable securities - available for sale