Deferred Revenue - Summary of Deferred Revenue (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	$ 45,137	$ 20,851
Long-term portion of deferred revenue	40,054	30,190
Total deferred revenue	85,191	51,041
Warranty
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	13,762	9,610
Long-term portion of deferred revenue	20,245	16,326
Total deferred revenue	34,007	25,936
Hardware Equipment
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	11,552	1,738
Long-term portion of deferred revenue	15,595	9,841
Total deferred revenue	27,147	11,579
AXON services
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	19,626	9,303
Long-term portion of deferred revenue	4,214	4,023
Total deferred revenue	23,840	13,326
Other
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	197	200
Long-term portion of deferred revenue	0	0
Total deferred revenue	197	200
TASER Weapons | Warranty
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	9,783	7,278
Long-term portion of deferred revenue	17,319	13,982
Total deferred revenue	27,102	21,260
TASER Weapons | Hardware Equipment
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	1,702	952
Long-term portion of deferred revenue	4,390	2,459
Total deferred revenue	6,092	3,411
Axon
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	33,455	12,421
Long-term portion of deferred revenue	18,345	13,749
Total deferred revenue	51,800	26,170
Axon | Warranty
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	3,979	2,332
Long-term portion of deferred revenue	2,926	2,344
Total deferred revenue	6,905	4,676
Axon | Hardware Equipment
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	9,850	786
Long-term portion of deferred revenue	11,205	7,382
Total deferred revenue	21,055	8,168
TASER Weapons and other
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	11,682	8,430
Long-term portion of deferred revenue	21,709	16,441
Total deferred revenue	$ 33,391	$ 24,871