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Product Line Divestiture (Details) - Clearfield, Inc. - Outdoor Cabinet Product Line - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Feb. 28, 2018 | Mar. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Disposal group, consideration | $ 10.4 |
Inventory transferred | $ 2.1 |
Period of new orders solicitation | 15 months |
Disposal group, deferred revenue | $ 1.6 |
Gain on disposal |  | $ 6.7

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