Severance and Other Exit Costs - Additional Information (Detail) $ in Thousands	1 Months Ended		3 Months Ended	11 Months Ended
	Jan. 31, 2019 position	Jan. 31, 2018 position	Mar. 31, 2020 USD ($) position	Dec. 31, 2018 position	Dec. 31, 2019 USD ($)
Employee Severance
Restructuring Cost and Reserve [Line Items]
Severance costs incurred			$ 1,646
Payments for restructuring			415
Accrued reserve			1,275		$ 44
Facilities Closing
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			244
Accrued reserve			2,203		$ 2,369
Facilities charge			$ 36
2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | position			47
Severance costs incurred			$ 1,600
2020 Restructuring Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			400
Accrued reserve			1,300
2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | position	40
2019 Restructuring Plan | Employee Severance
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			100
Accrued reserve			0
2019 Restructuring Plan | Facilities Closing
Restructuring Cost and Reserve [Line Items]
Accrued reserve			1,200
Facilities charge			0
2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | position		71		95
2018 Restructuring Plan | Facilities Closing
Restructuring Cost and Reserve [Line Items]
Payments for restructuring			0
Accrued reserve			100
Accounting Standards Update 2016-02 | 2018 Restructuring Plan | Facilities Closing
Restructuring Cost and Reserve [Line Items]
Facilities charge			$ 0