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Goodwill and Intangible Assets - Intangible Assets Other than Goodwill (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 24,438 | $ 26,727 |
Accumulated Amortization | (13,409) | (12,650) |
Total | 11,029 | 14,077 |
Not amortized, Gross Carrying Amount | 1,742 | 1,858 |
Intangible assets, Gross Carrying Amount | 26,180 | 28,585 |
Intangible Assets, Net Carrying Amount | 12,771 | 15,935 |
Amortization of intangible assets | 3,500 | 5,700 | $ 4,700
TASER trademark |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Not amortized, Gross Carrying Amount | 900 | 900 |
Patents and trademarks pending |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Not amortized, Gross Carrying Amount | 842 | 958 |
Domain names |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 3,161 | 3,161 |
Accumulated Amortization | (1,035) | (732) |
Total | $ 2,126 | 2,429 |
Domain names | Minimum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 5 years |  |
Domain names | Maximum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 10 years |  |
Issued patents |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 3,271 | 2,940 |
Accumulated Amortization | (1,339) | (1,106) |
Total | $ 1,932 | 1,834 |
Issued patents | Minimum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 5 years |  |
Issued patents | Maximum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 25 years |  |
Issued trademarks |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 1,166 | 1,053 |
Accumulated Amortization | (678) | (599) |
Total | $ 488 | 454 |
Issued trademarks | Minimum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 3 years |  |
Issued trademarks | Maximum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 15 years |  |
Customer relationships |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 3,721 | 3,701 |
Accumulated Amortization | (1,416) | (880) |
Total | $ 2,305 | 2,821 |
Customer relationships | Minimum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 4 years |  |
Customer relationships | Maximum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 8 years |  |
Non-compete agreements |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 450 | 540 |
Accumulated Amortization | (404) | (439) |
Total | $ 46 | 101 |
Non-compete agreements | Minimum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 3 years |  |
Non-compete agreements | Maximum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 4 years |  |
Developed technology |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 10,660 | 13,404 |
Accumulated Amortization | (6,528) | (7,081) |
Total | $ 4,132 | 6,323 |
Developed technology | Minimum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 3 years |  |
Developed technology | Maximum |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 5 years |  |
Re-acquired distribution rights |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Useful Life | 2 years |  |
Gross Carrying Amount | $ 2,009 | 1,928 |
Accumulated Amortization | (2,009) | (1,813) |
Total | $ 0 | $ 115 |

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