Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Schedule of Changes in Estimated Fair Value of Liability) (Details)

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Fair Value Measurements (Schedule of Changes in Estimated Fair Value of Liability) (Details) - Significant unobservable inputs (Level 3) [Member]
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Balance as of January 1, 2021
Acquisition of Whinstone 82,953
Change in fair value 444
Balance as of September 30, 2021 $ 83,397