Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Solar Turbines (Details)

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Intangible Assets - Solar Turbines (Details) - USD ($)
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Intangible Assets    
Years subject to payment of per-unit royalty fees 17 years  
Royalties earned $ 22,600 $ 27,400
Unpaid earned royalties $ 76,400 $ 53,800