Corporate Restructuring - Additional Information (Details) $ in Thousands		3 Months Ended	6 Months Ended
May 16, 2018 Employee	Aug. 04, 2018 USD ($)	Aug. 04, 2018 USD ($)
Restructuring And Related Activities [Abstract]
Corporate restructuring plan expected initiation, date	May 16, 2018
Number of positions eliminated	56
Percentage of positions eliminated from work force	15.00%
Percentage of total work force eliminated as a part of corporate restructuring plan	2.00%
Number of employees notified of their termination \| Employee	36
Number of positions representing open that will not be filled	20
Corporate restructuring charge		$ 1,570	$ 1,570
Expected restructuring cost		1,800	1,800
Restructuring and cost remaining cash expenditures		1,500
Accrued liability related to restructuring		$ 600	$ 600

Number of positions representing open that will not be filled.

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Restructuring and related cost number of employees notified of their termination.

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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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Date the restructuring activities were initiated or are expected to be initiated, in CCYY-MM-DD format.

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Amount expected to be recognized in earnings for the specified restructuring cost.

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The number of positions eliminated during the period as a result of restructuring activities.

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Percentage of the total number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s).

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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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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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