Business Combination - Schedule of assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Cash and cash equivalents	$ 32
Accounts receivable	124
Materials and supplies	538
Operating lease right-of-use	502
Prepaid expenses and other assets	266
Property, plant, and equipment	23,750
Intangible assets	11,130
Goodwill	10,434	$ 0
Total assets acquired	46,776
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Accounts payable	1,260
Accrued expenses and other liabilities	231
Lease liabilities	502
Deferred income taxes	4,668
Deferred revenue	556
Total liabilities assumed	7,217
Total fair value of net assets acquired	39,559
Less: redeemable noncontrolling interest	(17,644)
Less: noncontrolling interest	(3,551)
Total purchase price	$ 18,364