Segment Data (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments of company | segment			2
Net sales	$ 166,442	$ 130,837	$ 454,863	$ 359,009
Cost of sales	68,202	50,668	179,838	144,363
Gross margin	98,240	80,169	275,025	214,646
Research and development	29,246	25,129	85,187	71,976
TASER
Segment Reporting Information [Line Items]
Net sales	84,406	71,743	230,791	197,706
Cost of sales	31,297	26,504	88,787	74,044
Gross margin	53,109	45,239	142,004	123,662
Research and development	3,355	3,485	10,149	10,284
Software and Sensors
Segment Reporting Information [Line Items]
Net sales	82,036	59,094	224,072	161,303
Cost of sales	36,905	24,164	91,051	70,319
Gross margin	45,131	34,930	133,021	90,984
Research and development	25,891	21,644	75,038	61,692
Product
Segment Reporting Information [Line Items]
Net sales	120,091	96,497	326,134	264,977
Cost of sales	57,798	42,445	150,507	120,265
Product | TASER
Segment Reporting Information [Line Items]
Net sales	83,517	71,424	228,569	197,148
Cost of sales	31,297	26,504	88,787	74,044
Product | Software and Sensors
Segment Reporting Information [Line Items]
Net sales	36,574	25,073	97,565	67,829
Cost of sales	26,501	15,941	61,720	46,221
Service
Segment Reporting Information [Line Items]
Net sales	46,351	34,340	128,729	94,032
Cost of sales	10,404	8,223	29,331	24,098
Service | TASER
Segment Reporting Information [Line Items]
Net sales	889	319	2,222	558
Cost of sales	0	0
Service | Software and Sensors
Segment Reporting Information [Line Items]
Net sales	45,462	34,021	126,507	93,474
Cost of sales	$ 10,404	$ 8,223	$ 29,331	$ 24,098