Annual report pursuant to Section 13 and 15(d)

Other Current Liabilities (Details)

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Other Current Liabilities (Details) (USD $)
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
UTCP
     
Other Current Liabilities      
Capacity of microturbine (in kW) 200    
Cash contribution $ 12,000,000    
In-kind services contribution 800,000    
Royalty payable (as a percent) 10.00%    
Royalty payable after recovery of cash and in-kind services (as a percent) 5.00%    
Carrier
     
Other Current Liabilities      
Royalties earned 4,300,000 3,200,000 1,900,000
Unpaid earned royalties $ 1,400,000 $ 1,000,000