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Basis of Presentation and Significant Accounting Policies - Schedule of Effect of New Accounting Pronouncements (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Inventories, net | $ 69,382 | $ 72,860 | $ 76,420
Deferred revenue | 116 | 473 | 4,703
Retained earnings | $ 16,860 | 107,593 | 106,923
Calculated under Revenue Guidance in Effect before Topic 606 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Inventories, net |  |  | 76,420
Deferred revenue |  |  | 4,703
Retained earnings |  |  | $ 106,923
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Inventories, net |  | (3,560) |
Deferred revenue |  | (4,230) |
Retained earnings |  | $ 670 |

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