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SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION - Deferred Costs and Deferred Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Jan. 01, 2020
Dec. 31, 2019
Jan. 01, 2019
Deferred Costs     $ 2,525   $ 6,994
Total deferred costs amortized $ 5,396 $ 12,905      
Deferred revenue 5,168 5,675 $ 3,481 $ 3,481 $ 10,501
Revenue recognized that was included in deferred revenue balances at beginning of period 3,093 6,893      
Prepaid expenses and other current assets          
Deferred Costs $ 4,828 $ 3,997