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Goodwill
 9 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Goodwill
The following presents changes in goodwill during 2019 (in thousands):
Goodwill
December 31, 2018$— 
Acquisition of American Electric
139 
Acquisition of Diversenergy
4,314 
December 31, 20194,453 
Business acquisitions during the third quarter of 2019 account for the balance of goodwill as of September 30, 2020. The Company performs an impairment test for goodwill annually or more frequently if indicators of potential impairment exist. We completed our annual goodwill impairment test as of September 30, 2020 and no impairments were identified.
See Note 3—Acquisitions for discussion of the acquisitions.