Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ 50,735	$ (12,388)	$ (80,716)	$ (48,480)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Loss from Equity Method Investment in the Joint Venture	8,764	17,468	104,497	65,805
Deferred income tax expense (benefit)			(564)	(16,664)
(Gain) Loss on Sale of Interests in the Joint Venture				(661)
(Gain) loss on forward purchase contracts			(71,649)
Amortization of debt discount and issuance costs	191		403
Other			1,526
Changes in operating assets and liabilities:
Prepaid expenses			(1,544)
Due from the Joint Venture			(3,056)	(188)
Due from McKesson			(213)
Income taxes receivable			422	13,292
Accounts payable and accrued expenses			83	189
Due to McKesson			47,172
Due to the Joint Venture			3,639	(9,662)
Net cash provided by (used in) operating activities				3,631
Cash flows from investing activities:
Proceeds from sale of interests in Joint Venture				6,502
Investment in debt and equity securities of the Joint Venture			(278,875)
Proceeds from investments in debt securities of the Joint Venture			7,332
Investment in the Joint Venture			(610,784)
Net cash provided by (used in) investing activities			(882,327)	6,502
Cash flows from financing activities:
Proceeds from initial public offering, net of issuance costs			608,679
Proceeds from issuance of equity component of tangible equity units, net of issuance costs			232,929
Proceeds from issuance of debt component of tangible equity units			47,367
Payment of loan costs			(1,421)
Repayment of senior amortizing notes			(7,332)
Proceeds from exercise of equity awards			2,105
Payments to acquire common stock				(6,502)
Net cash provided by (used in) financing activities			882,327	(6,502)
Net increase (decrease) in cash, cash equivalents and restricted cash				3,631
Cash, cash equivalents and restricted cash at beginning of period			3,409
Cash, cash equivalents and restricted cash at end of period	$ 3,409	$ 3,631	$ 3,409	$ 3,631