Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Details 2)

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Intangible Assets (Details 2) (Solar, USD $)
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Solar
     
Intangible Assets      
Years subject to payment of per-unit royalty fees 17 years    
Royalties earned $ 83,000 $ 76,700 $ 72,800
Unpaid earned royalties $ 20,700 $ 24,600