Annual report pursuant to Section 13 and 15(d)

Term Note Payable - Thee-Year Term Note - General Information (Details)

Term Note Payable - Thee-Year Term Note - General Information (Details)			12 Months Ended
	Oct. 01, 2020 USD ($)	Feb. 04, 2019 USD ($)	Mar. 31, 2021 USD ($) MW	Mar. 31, 2020 USD ($)	May 13, 2021 USD ($) MW	May 12, 2021 USD ($) MW	Jun. 16, 2020	Dec. 09, 2019
Term Note Payable
Long-term debt			$ 51,000,000
Interest expenses			5,156,000	$ 5,198,000
Amortization of debt issuance costs			623,000	1,155,000
Term Note Payable \| Senior Notes
Term Note Payable
Long-term debt			51,000,000
Debt discount and debt issuance costs, net			100,000
Amortization of the debt discount and debt issuance costs			600,000	1,200,000
Interest expenses			5,200,000	$ 600,000
Amortization of debt issuance costs			1,200,000
Term Note Payable, Note Purchase Agreement \| Senior Notes
Term Note Payable
Debt instrument, issuance date		Feb. 04, 2019
Aggregate principal amount		$ 30,000,000
Interest rate (as a percent)		13.00%
Debt instrument, frequency of periodic payment		quarterly
Debt instrument, Section 382 Ownership Shift threshold								40.00%
Debt instrument, Section 382 Ownership Shift threshold, until April 1, 2021							42.00%
Debt instrument, Section 382 Ownership Shift threshold, after April 1, 2021							40.00%
Term Note Payable, Amended and Restated Note Purchase Agreement \| Senior Notes
Term Note Payable
Debt instrument, issuance date	Oct. 01, 2020
Aggregate principal amount	$ 20,000,000
Debt instrument, covenants, minimum consolidated liquidity			$ 9,000,000
Debt instrument, covenants, minimum power of Rental Fleet by 9-month anniversary of Closing Date \| MW			6.25
Debt instrument, covenants, minimum power of Rental Fleet by 18-month anniversary of Closing Date \| MW			12.50
Term Note Payable, Amended and Restated Note Purchase Agreement \| Senior Notes \| Subsequent event
Term Note Payable
Debt instrument, covenants, minimum consolidated liquidity					$ 12,200,000	$ 9,000,000
Debt instrument, covenants, minimum power of Rental Fleet by 9-month anniversary of Closing Date \| MW					2.00	6.25
Debt instrument, covenants, minimum power of Rental Fleet by 18-month anniversary of Closing Date \| MW					12.50	12.50
Term Note Payable, Amended and Restated Note Purchase Agreement \| Senior Notes \| London Interbank Offered Rate (LIBOR)
Term Note Payable
Variable interest rate basis spread (as a percent)	8.75%