The Company amortizes its intangible assets from its business combinations over 6 to 10 years. Amortization is based on the pattern in which the estimated economic benefits of the intangible asset will be consumed. The Company evaluates the recoverability of its intangible assets periodically if there is a triggering event. The amortization expense for these intangible assets was $0.4 million for both the three months ended September 30, 2021 and 2020 and $1.1 million and $1.2 million for the nine months ended September 30, 2021 and 2020, respectively.