As of September 30, 2023, the weighted-average amortization period for customer relationships and developed technology was 10.2 years, for trade names was 3.2 years, for backlog was 0.3 years, and for patents and FCC licenses was 6.5 years. Amortization expense related to intangible assets for the three and nine months ended September 30, 2023 was $881 and $2,644, respectively, and for the three and nine months ended September 30, 2022 was $1,730 and $3,478, respectively.

No impairment charges were recognized for the three and nine months ended September 30, 2023 and 2022. The patents asset balance as of each of September 30, 2023 and December 31, 2022 included $57 of capitalized patent costs that will begin amortization upon the issuance of an official patent right to the Company.