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Goodwill and Intangible Assets, Net (Tables)
 6 Months Ended
Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Carrying Value of Goodwill Attributable to Each Reportable Segment The changes in the carrying value of goodwill balances by reportable segment were as follows:
U.S. RegionsU.S. FederalCanadaAlternative FuelsOtherTotal
Balance, December 31, 2021$39,204 $3,981 $3,454 $— $24,518 $71,157 
Remeasurement period adjustment389 — — — — 389 
Currency effects— — (52)— (669)(721)
Balance, June 30, 2022$39,593 $3,981 $3,402 $— $23,849 $70,825 
Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets Definite-lived intangible assets, net consisted of the following:
As of June 30, 2022As of December 31, 2021
Gross carrying amount$32,375 33,526 
Less - accumulated amortization(26,843)(26,565)
Intangible assets, net$5,532 $6,961 
Schedule of Amortization Expense The table below sets forth amortization expense:
Three Months Ended June 30,Six Months Ended June 30,
Asset typeLocation2022202120222021
Customer contractsCost of revenues$137 $— $321 $— 
All other intangible assetsSelling, general and administrative expenses305 81 699 161 
Total amortization expense$442 $81 $1,020 $161