Deferred Revenue - Summary of Deferred Revenue (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	$ 46,508	$ 35,688
Current portion of deferred revenue	19,628	14,020
Deferred revenue, net of current portion	26,880	21,668
Warranty
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	24,262	21,973
Current portion of deferred revenue	8,923	7,270
Deferred revenue, net of current portion	15,339	14,703
Hardware equipment
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	9,316	4,252
Current portion of deferred revenue	1,776	856
Deferred revenue, net of current portion	7,540	3,396
AXON services
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	12,570	9,286
Current portion of deferred revenue	8,569	5,717
Deferred revenue, net of current portion	4,001	3,569
Other
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	360	177
Current portion of deferred revenue	360	177
Deferred revenue, net of current portion	0	0
TASER Weapons
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	23,375	21,695
Current portion of deferred revenue	8,555	7,133
Deferred revenue, net of current portion	14,820	14,562
TASER Weapons | Warranty
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	20,617	20,400
Current portion of deferred revenue	7,244	6,591
Deferred revenue, net of current portion	13,373	13,809
TASER Weapons | Hardware equipment
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	2,398	1,118
Current portion of deferred revenue	951	365
Deferred revenue, net of current portion	1,447	753
Axon
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	23,133	13,993
Current portion of deferred revenue	11,073	6,887
Deferred revenue, net of current portion	12,060	7,106
Axon | Warranty
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	3,645	1,573
Current portion of deferred revenue	1,679	679
Deferred revenue, net of current portion	1,966	894
Axon | Hardware equipment
Deferred Revenue Arrangement [Line Items]
Total deferred revenue	6,918	3,134
Current portion of deferred revenue	825	491
Deferred revenue, net of current portion	$ 6,093	$ 2,643