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Goodwill and Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The changes in the carrying amount of goodwill for the nine months ended September 30, 2017 were as follows (in thousands):
 
TASER
Weapons
 
Software and Sensors
 
Total
Balance, beginning of period
$
562

 
$
9,880

 
$
10,442

Goodwill acquired
825

 
3,505

 
4,330

Purchase accounting adjustments
—

 
23

 
23

Foreign currency translation adjustment
64

 
64

 
128

Balance, end of period
$
1,451

 
$
13,472

 
$
14,923
Intangible Assets Other than goodwill
Intangible assets (other than goodwill) consisted of the following (in thousands):
 
 
 
September 30, 2017
 
December 31, 2016
 
Useful
Life
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Amortized:
 
 
 
 
 
 
 
 
 
 
 
 
 
Domain names
5-10 years
 
$
3,161

 
$
(352
)
 
$
2,809

 
$
3,161

 
$
(125
)
 
$
3,036

Issued patents
4-15 years
 
1,985

 
(874
)
 
1,111

 
1,942

 
(780
)
 
1,162

Issued trademarks
3-11 years
 
714

 
(378
)
 
336

 
655

 
(320
)
 
335

Customer relationships
4-8 years
 
1,374

 
(389
)
 
985

 
914

 
(240
)
 
674

Non-compete agreements
3-4 years
 
555

 
(317
)
 
238

 
465

 
(236
)
 
229

Developed technology
3-7 years
 
14,480

 
(3,159
)
 
11,321

 
8,661

 
(824
)
 
7,837

Re-acquired distribution rights
2 years
 
2,140

 
(357
)
 
1,783

 
—

 
—

 
—

Total amortized
 
 
24,409

 
(5,826
)
 
18,583

 
15,798

 
(2,525
)
 
13,273

Not amortized:
 
 
 
 
 
 
 
 
 
 
 
 
 
TASER trademark
 
 
900

 
 
 
900

 
900

 
 
 
900

Patents and trademarks pending
 
 
1,275

 
 
 
1,275

 
1,045

 
 
 
1,045

Total not amortized
 
 
2,175

 
 
 
2,175

 
1,945

 
 
 
1,945

Total intangible assets
 
 
$
26,584

 
$
(5,826
)
 
$
20,758

 
$
17,743

 
$
(2,525
)
 
$
15,218
Estimated Amortization Expense of Intangible Assets
Estimated amortization for intangible assets with definite lives for the remaining three months of 2017, the next five years ended December 31, and thereafter, is as follows (in thousands):
2017 (remaining three months)
$
1,398

2018
5,585

2019
4,036

2020
2,568

2021
2,433

2022
782

Thereafter
1,781

Total
$
18,583