Net Income (Loss) Per Share (Tables)

6 Months Ended

12 Months Ended

Sep. 30, 2019

Mar. 31, 2019

Earnings Per Share [Abstract]

Computation of Basic Net Income (Loss) Per Share of Common Stock

	Six Months Ended September 30,
	2019			2018
Basic net income (loss) per share:
Numerator:
Net income (loss)	$	(131,451	)	$	(36,092	)
Denominator:
Weighted average common shares outstanding		99,897,191			75,555,700
Minimum shares issuable under purchase contracts		9,214,662			—
		109,111,853			75,555,700
Basic net income (loss) per share	$	(1.20	)	$	(0.48	)

	Year Ended March 31, 2019			Year Ended March 31, 2018		Period from June 22, 2016 (inception) to March 31, 2017
Basic net income per share:
Numerator:
Net income (loss)	$	(52,012	)	$	60,955	$	(26,294	)
Denominator:
Weighted average common shares outstanding		75,513,130			75,590,613		8,268,077
Basic net income (loss) per share	$	(0.69	)	$	0.81	$	(3.18	)
Diluted net income per share:
Numerator:
Net income (loss)	$	(52,012	)	$	60,955	$	(26,294	)
Denominator:
Number of shares used in basic computation		75,513,130			75,590,613		8,268,077
Weighted average effect of dilutive securities
Add:
Replacement Time-Vesting Options		—			2,051,346		—
Replacement Restricted Share Units		—			28,440		—
RSUs		—			130,697		—
		75,513,130			77,801,096		8,268,077
Diluted net income (loss) per share	$	(0.69	)	$	0.78	$	(3.18	)

Antidilutive Securities Excluded from Diluted Net Income (Loss) Per Share

	Six Months Ended September 30,
	2019		2018
Incremental shares issuable under purchase contracts		1,842,875		—
Time-Vesting Options		1,405,556		1,839,878
Restricted Stock Units		454,373		—

	Year Ended March 31, 2019		Year Ended March 31, 2018		Period from June 22, 2016 (inception) to March 31, 2017
Time-Vesting Options		—		4,570,624		—
Replacement Time-Vesting Options		1,869,456		—		5,790,257
Replacement Restricted Share Units		—		—		75,840