Background and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands		3 Months Ended
	Jul. 31, 2019	Jun. 30, 2020 USD ($) Segment	Apr. 01, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments | Segment		3
Change in Accounting Principle, Accounting Standards Update, Adopted		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Apr. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect		false
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Adjustment to Retained deficit at the date of adoption		$ 614,589		$ 537,485	$ 212,184	$ 398,313
Retained Deficit [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Adjustment to Retained deficit at the date of adoption		$ (205,669)		(267,619)	$ (278,727)	$ 17,582
Cumulative Effect, Period of Adoption, Adjustment [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Adjustment to Retained deficit at the date of adoption				(779)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Deficit [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Adjustment to Retained deficit at the date of adoption			$ 800	$ (779)
IWT [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items]
Agreement and Plan of Merger date	Jul. 31, 2019	Jul. 31, 2019