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Goodwill and Intangible Assets | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets |
Goodwill and Intangible Assets | Note 7 - Goodwill and Intangible Assets The changes in the carrying amount of goodwill for the year ended December 31, 2022 were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Software and |  | ​ | ​
​ | ​ | TASER | ​ | Sensors | ​ | Total
Balance, beginning of period | ​ | $ | 1,396 | ​ | $ | 42,196 | ​ | $ | 43,592
Goodwill acquired | ​ | ​ | 1,674 | ​ | ​ | — | ​ | ​ | 1,674
Purchase accounting adjustments | ​ | ​ | — | ​ | ​ | (58) | ​ | ​ | (58)
Foreign currency translation adjustments | ​ |  | (113) | ​ |  | (112) | ​ |  | (225)
Balance, end of period | ​ | $ | 2,957 | ​ | $ | 42,026 | ​ | $ | 44,983
​ Intangible assets (other than goodwill) consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | December 31, 2022 | ​ | December 31, 2021
​ |  | ​ |  | Gross |  | ​ | ​ |  | Net |  | Gross |  | ​ | ​ |  | Net
​ | ​ | Useful | ​ | Carrying | ​ | Accumulated | ​ | Carrying | ​ | Carrying | ​ | Accumulated | ​ | Carrying
​ | ​ | Life | ​ | Amount | ​ | Amortization | ​ | Amount | ​ | Amount | ​ | Amortization | ​ | Amount
Amortizable (definite-lived) intangible assets: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Domain names |  | 5 ‑ 10 years | ​ | $ | 3,043 | ​ | $ | (1,823) | ​ | $ | 1,220 | ​ | $ | 3,043 | ​ | $ | (1,518) | ​ | $ | 1,525
Issued patents |  | 5 ‑ 25 years | ​ |  | 2,981 | ​ |  | (1,507) | ​ |  | 1,474 | ​ |  | 3,061 | ​ |  | (1,457) | ​ |  | 1,604
Issued trademarks |  | 3 ‑ 15 years | ​ |  | 1,119 | ​ |  | (713) | ​ |  | 406 | ​ |  | 1,130 | ​ |  | (643) | ​ |  | 487
Customer relationships |  | 4 ‑ 8 years | ​ |  | 4,892 | ​ |  | (2,995) | ​ |  | 1,897 | ​ |  | 4,985 | ​ |  | (2,439) | ​ |  | 2,546
Non-compete agreements |  | 3 ‑ 4 years | ​ |  | 447 | ​ |  | (447) | ​ |  | — | ​ |  | 454 | ​ |  | (444) | ​ |  | 10
Developed technology |  | 3 ‑ 5 years | ​ |  | 18,586 | ​ |  | (13,244) | ​ |  | 5,342 | ​ |  | 18,060 | ​ |  | (10,465) | ​ |  | 7,595
Total amortizable |  |  | ​ |  | 31,068 | ​ |  | (20,729) | ​ |  | 10,339 | ​ |  | 30,733 | ​ |  | (16,966) | ​ |  | 13,767
Non-amortizable (indefinite-lived) intangible assets: |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
TASER trademark |  |  | ​ |  | 900 | ​ |  | — | ​ |  | 900 | ​ |  | 900 | ​ |  | — | ​ |  | 900
My90 trademark | ​ | ​ | ​ | ​ | 168 | ​ | ​ | — | ​ | ​ | 168 | ​ | ​ | 168 | ​ | ​ | — | ​ | ​ | 168
Patents and trademarks pending |  |  | ​ |  | 751 | ​ |  | — | ​ |  | 751 | ​ |  | 635 | ​ |  | — | ​ |  | 635
Total non-amortizable |  |  | ​ |  | 1,819 | ​ |  | — | ​ |  | 1,819 | ​ |  | 1,703 | ​ |  | — | ​ |  | 1,703
Total intangible assets |  |  | ​ | $ | 32,887 | ​ | $ | (20,729) | ​ | $ | 12,158 | ​ | $ | 32,436 | ​ | $ | (16,966) | ​ | $ | 15,470
​ Amortization expense of intangible assets was $4.0 million, $2.9 million and $3.3 million for the years ended December 31, 2022, 2021 and 2020, respectively. Estimated amortization for intangible assets with definitive lives for the next five years ended December 31, and thereafter, is as follows (in thousands): ​
​ | ​ | ​ | ​
2023 |  | $ | 3,786
2024 | ​ |  | 3,722
2025 | ​ |  | 887
2026 | ​ |  | 688
2027 | ​ |  | 354
Thereafter | ​ |  | 902
Total | ​ | $ | 10,339
​

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI https://asc.fasb.org/topic&trid=2144416 + Details
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