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Restructuring - Schedule of Charges and Payments (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 04, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated, period percent	8.00%
Restructuring Reserve [Roll Forward]
Charges to operations		$ (12)	$ 0	$ 1,328	$ 0
Accrued restructuring		493		493		$ 0
Severance pay and benefits
Restructuring Reserve [Roll Forward]
Accrued restructuring balance at April 1, 2017				0
Charges to operations				1,328
Cash payments				(746)
Accrued restructuring balance at September 30, 2017		582		$ 582
Former executive officer | Severance pay and benefits
Restructuring Cost and Reserve [Line Items]
Period of post employment salary	18 months
Share multiplier, unpaid cash owed percentage				120.00%
Restructuring Reserve [Roll Forward]
Charges to operations				$ 500
Accounts payable and accrued expenses | Severance pay and benefits
Restructuring Reserve [Roll Forward]
Accrued restructuring		500		500
Other liabilities | Severance pay and benefits
Restructuring Reserve [Roll Forward]
Restructuring reserve, noncurrent		$ 100		$ 100

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
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The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s).

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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