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Number of bitcoin options held.

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Digital Currencies (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
Digital Currencies (Narrative) (Details) $ in Thousands	Sep. 30, 2026 USD ($) Number_of_coins	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($) Number_of_coins	Sep. 30, 2025 USD ($)	Mar. 31, 2026 USD ($) Number_of_coins
Finite-Lived Intangible Assets [Line Items]
Net realized and unrealized gains (losses) on digital currencies	$ 5,300	$ 4,600	$ 4,500	$ (27,700)
Cumulative realized gain (loss)	1,900	4,200	2,600	21,500
Revaluation gain (loss)	3,400	400	1,900	6,200
Proceeds from digital currency sold	70,000	118,600	140,800	325,800
Option value	$ 22,082		$ 22,082		$ 606
Bitcoin [Member]
Finite-Lived Intangible Assets [Line Items]
Number of Bitcoin repurchased \| Number_of_coins			259
Number of Bitcoin transferred as deposit on equipment \| Number_of_coins			46		2,139
Bitcoin [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Bitcoin strike price			$ 87
Bitcoin [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Bitcoin strike price			$ 88
Digital currencies option [Member]
Finite-Lived Intangible Assets [Line Items]
Number of Bitcoin options held \| Number_of_coins	212		212		166
Option value	$ 300		$ 300		$ 600
Remeasurement gain (loss) recognized	$ 200	$ 900	$ 500	$ 17,500