The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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Restructuring Plan - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring costs		$ 175	$ 1,882
Lease Right of Use Assets and Property Plant and Equipment
Restructuring Cost And Reserve [Line Items]
Other asset impairment charges		$ 1,916	$ 2,405
Research and Development Costs
Restructuring Cost And Reserve [Line Items]
Restructuring plan, percentage of number of positions eliminated	4.00%