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Other Deferred Items and Liabilities - Summary of Other Deferred Items and Liabilities (Parenthetical) (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Other Liabilities Disclosure [Abstract]    
Contract liabilities $ 2,124,000 [1] $ 0
[1] In connection with the adoption of Topic 606, we elected to more prominently present contract liabilities on the Consolidated Balance Sheets. Consequently, customer deposits were reclassified in 2017 to “Contract liabilities” and to other certain current liabilities to conform to the current period presentation.” There were no long-term contract liabilities as of December 31, 2017. Refer to Note 2 – Revenue and Related Contract Costs and Contract Liabilities for additional information.