Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies and Going Concern - Evaluation of Ability to Maintain Current Level of Operations (Details)

Summary of Significant Accounting Policies and Going Concern - Evaluation of Ability to Maintain Current Level of Operations (Details) $ in Thousands				1 Months Ended		3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 07, 2023 USD ($)	Apr. 15, 2022 employee	Feb. 28, 2022 MWh employee	Mar. 31, 2022 USD ($)	Feb. 28, 2022 USD ($) MWh employee	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Nov. 14, 2023 USD ($)	Nov. 13, 2023 USD ($)	Oct. 02, 2023 USD ($)
Net loss						$ (7,299)	$ (5,288)	$ (5,562)	$ (4,221)	$ (5,095)	$ (8,850)	$ (5,673)	$ (1,139)	$ (9,783)	$ (6,812)	$ (15,071)	$ (15,662)	$ (22,370)	$ (20,757)
Cash received (used) in operating activities									(10,141)				(1,871)	(19,355)	(20)	(22,993)	(3,366)	(27,498)	1,701
Cash and cash equivalents				$ 22,559		22,559	$ 31,267	$ 38,267	$ 49,216	$ 49,533	$ 31,970	$ 16,782	$ 16,229	$ 38,267	$ 16,782	$ 31,267	$ 31,970	22,559	$ 49,533
Long-term debt				$ 51,000		$ 51,000												$ 51,000
Number of employees furloughed \| employee			17		17
Term of furlough			120 days
Rental units achieved \| MWh			21.1		21.1
Rental revenue					$ 2,800
Program Fee As Percentage Of Prior Calendar Year Revenue				5.00%	3.00%
Reorganization, common equity ownership of new subsidiary, subject to dilution, percentage	62.50%
Subsequent Event [Member]
Percentage of pay cuts for employees		15.00%
Number of employees to whom pay cuts instituted \| employee		36
Percentage of pay cuts for members of senior leadership team		25.00%
Reorganization, percentage of equity received by pre-petition equity holders	100.00%
Reorganization, Percentage of equity owned by pre-petition senior secured lender	100.00%
Reorganization, pre-petition claims, amount	$ 35,000
Debtor reorganization items, discharge of claims and liabilities	$ 10,000
Reorganization, common equity issued, percentage	100.00%
Reorganization, preferred equity issued, percentage	100.00%
Reorganization, preferred equity convertible into common equity, percentage	37.50%
Subsequent Event [Member] \| DIP Credit Facility
Debtor in possession financing amount arranged																						$ 30,000
Aggregate principal amount																					$ 3,000	9,000
Subsequent Event [Member] \| DIP Notes
Debtor in possession financing amount arranged																						12,000
Subsequent Event [Member] \| Existing Pre-Petition Debt
Debtor in possession financing amount arranged																						$ 18,000
Subsequent Event [Member] \| Exit Facility
Aggregate principal amount	$ 27,000																			$ 25,000
Subsequent Event [Member] \| New Money Notes
Aggregate principal amount	7,000																			$ 5,000
Subsequent Event [Member] \| Roll up of Secured Obligation under Pre-Petition Debt
Aggregate principal amount	$ 8,000
Term of loan	3 years
Subsequent Event [Member] \| DIP New Money Notes
Aggregate principal amount	$ 12,000
Term of loan	2 years