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Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]  
Assessment of revenue under ASC 606 A summary of amounts collected and recorded as net sales for the years ended December 31, 2020 and 2019, as well as amounts still outstanding as of those dates, are as follows (amounts in thousands):
 Amounts Invoiced and Not CollectedDeferred Cost of Sales
Amounts as of September 30, 2019$48,883 $6,415 
Revenue recognized related to amounts invoiced and not collected at September 30, 2019:
Transition Adjustment during the three months ended September 30, 2019(21,385)(2,565)
Cash collected during the three months ended December 31, 2019 related to the Remaining Contracts(8,219)(1,151)
(29,604)(3,716)
Write-off of customer contracts where collection is no longer reasonably assured (a)(10,273)(1,438)
Amounts as of December 31, 20199,006 1,261 
Cash collected during the year ended December 31, 2020 related to the Remaining Contracts(7,767)(1,087)
Amounts as of December 31, 2020$1,239 $174 
(a) The Company determined that for approximately $10.3 million of existing contracts where payment had not been received, collection was no longer reasonably assured. As a result, $1.4 million of deferred cost of sales relating to these customers was written off. Any future collections relating to these customer contracts will be recorded as revenue at the time payment is received.