Deferred Revenue - Summary of Deferred Revenue (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	$ 41,284	$ 20,851
Deferred revenue, Long-Term	35,968	30,190
Total deferred revenue	77,252	51,041
Warranty
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	13,603	9,610
Deferred revenue, Long-Term	18,684	16,326
Total deferred revenue	32,287	25,936
Hardware
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	11,497	1,738
Deferred revenue, Long-Term	12,882	9,841
Total deferred revenue	24,379	11,579
AXON services
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	15,818	9,303
Deferred revenue, Long-Term	4,402	4,023
Total deferred revenue	20,220	13,326
Other
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	366	200
Deferred revenue, Long-Term	0	0
Total deferred revenue	366	200
TASER Weapons
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	11,910	8,430
Deferred revenue, Long-Term	18,727	16,441
Total deferred revenue	30,637	24,871
TASER Weapons | Warranty
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	10,304	7,278
Deferred revenue, Long-Term	16,286	13,982
Total deferred revenue	26,590	21,260
TASER Weapons | Hardware
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	1,240	952
Deferred revenue, Long-Term	2,441	2,459
Total deferred revenue	3,681	3,411
Axon
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	29,374	12,421
Deferred revenue, Long-Term	17,241	13,749
Total deferred revenue	46,615	26,170
Axon | Warranty
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	3,299	2,332
Deferred revenue, Long-Term	2,398	2,344
Total deferred revenue	5,697	4,676
Axon | Hardware
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	10,257	786
Deferred revenue, Long-Term	10,441	7,382
Total deferred revenue	$ 20,698	$ 8,168