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FAIR VALUE MEASUREMENTS (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Mar. 31, 2013
Assets [Abstract]    
Cash equivalents $ 20,079 $ 12,189
Available-for-sale Investments [Abstract]    
Certificates of deposit 999 1,001
Corporate bonds 6,074 6,094
Municipal bonds   529
Total assets at fair value 27,152 19,813
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
   
Assets [Abstract]    
Cash equivalents 20,079 12,189
Available-for-sale Investments [Abstract]    
Certificates of deposit 0 0
Corporate bonds 0 0
Municipal bonds   0
Total assets at fair value 20,079 12,189
Significant Other Observable Inputs Level 2 [Member]
   
Assets [Abstract]    
Cash equivalents 0 0
Available-for-sale Investments [Abstract]    
Certificates of deposit 999 1,001
Corporate bonds 6,074 6,094
Municipal bonds   529
Total assets at fair value 7,073 7,624
Significant Unobservable Inputs Level 3 [Member]
   
Assets [Abstract]    
Cash equivalents 0 0
Available-for-sale Investments [Abstract]    
Certificates of deposit 0 0
Corporate bonds 0 0
Municipal bonds   0
Total assets at fair value $ 0 $ 0