Recent Litigation (Details) $ in Thousands		3 Months Ended
Nov. 21, 2017 employee	Mar. 31, 2019 USD ($)
Recent Litigation
Number of employees filed suit \| employee	3
Litigation reserve		$ 325
Increase to litigation reserve		$ 125

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

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Balance Type:	debit
Period Type:	duration