Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Operating expenses:
Research and development	[1]	$ 48,927	$ 58,434	$ 150,847	$ 163,588
General and administrative	[2]	29,142	10,686	59,897	29,738
Total operating expenses		78,069	69,120	210,744	193,326
Interest expense		3,641	1,634	11,222	4,831
Loss on extinguishment of debt		4,851	0	4,851	0
Interest expense (related party)		16	0	16	0
Interest income		(597)	0	(2,305)	0
Other (income) expense, net		(567)	(121)	(1,151)	147
Loss before income taxes		(85,413)	(70,633)	(223,377)	(198,304)
Income tax expense		191	0	699	233
Net loss		$ (85,604)	$ (70,633)	$ (224,076)	$ (198,537)
Net loss per common share — basic and diluted (in USD per share)		$ (0.96)	$ (1.04)	$ (2.64)	$ (3.01)
Weighted average common shares outstanding — basic and diluted (in shares)		88,893,579	67,616,419	84,750,114	65,873,779

[1] Includes $25 and $41 of costs allocated from the Company’s former majority shareholder, during the three months ended December 31, 2019 and 2018, respectively, and $76 and $2,524 of costs allocated from the Company’s former majority shareholder during the nine months ended December 31, 2019 and 2018, respectively. Also includes share-based compensation expense (see Note 10).

[2] Includes $195 and $470 of costs allocated from the Company’s former majority shareholder during the three months ended December 31, 2019 and 2018, respectively, and $617 and $2,644 of costs allocated from the Company’s former majority shareholder during the nine months ended December 31, 2019 and 2018, respectively. Also includes share-based compensation expense (see Note 10).