Nature of Business and Organization (Narrative) (Details) $ / shares in Units, $ in Thousands			1 Months Ended	9 Months Ended
	Jul. 01, 2019 USD ($) shares	Jun. 26, 2019 $ / shares shares	Jul. 31, 2019 USD ($) shares	Dec. 31, 2019 USD ($) $ / shares shares	Mar. 31, 2019 $ / shares shares
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership percentage in Joint Venture	41.00%			41.00%
Stock split conversion ratio		126.4
Common Stock, shares authorized		9,000,000,000		9,000,000,000	252,800,000
Common Stock, par value | $ / shares		$ 0.001		$ 0.001	$ 0.001
Preferred stock, shares authorized		900,000,000		900,000,000	0
Preferred stock, par value | $ / shares		$ 0.001		$ 0.001	$ 0.001
Share offering	49,285,713
Tangible equity unit offering	5,750,000
Proceeds from initial public offering | $	$ 608,679			$ 608,679
Proceeds from tangible equity units | $	$ 278,875		$ 278,875	$ 278,875
Shares received from Joint Venture	49,285,713
McKesson Corporation [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership percentage in Joint Venture				59.00%
Common Class X [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Common Stock, shares authorized		1		1	1
Common Stock, par value | $ / shares		$ 0.001		$ 0.001	$ 0.001
Tangible Equity Units [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Tangible equity unit offering			5,750,000
Joint Venture [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Repayment of debt | $			$ 805,000