Subsequent Events (Details) - Subsequent Event $ in Millions	3 Months Ended
	Jun. 30, 2022 USD ($) MW	Jul. 13, 2022 USD ($)
Term Note Payable, Amended and Restated Note Purchase Agreement \| Senior Notes
Subsequent Events
Requirements to use commercially reasonable best efforts to raise at least financing through a sale of common stock by September 14, 2022 and refinance the Notes by October 1, 2022		$ 10.0
Used Microturbine Equipment Rented to End Users
Subsequent Events
Microturbines, power output \| MW	11.8
Commitment value	$ 9.5
Used Microturbine Equipment Rented to End Users \| Arithmetic Average
Subsequent Events
Term of contract	36 months