Segment Data (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments of company | segment			2
Net sales	$ 218,795	$ 141,259	$ 413,814	$ 288,421
Cost of sales	80,866	53,082	152,532	111,636
Gross margin	137,929	88,177	261,282	176,785
Research and development	53,952	29,560	100,970	55,941
TASER
Segment Reporting Information [Line Items]
Net sales	112,528	70,490	211,527	146,385
Cost of sales	37,846	27,242	70,791	57,490
Gross margin	74,682	43,248	140,736	88,895
Research and development	12,313	3,762	21,556	6,794
Software and Sensors
Segment Reporting Information [Line Items]
Net sales	106,267	70,769	202,287	142,036
Cost of sales	43,020	25,840	81,741	54,146
Gross margin	63,247	44,929	120,546	87,890
Research and development	41,639	25,798	79,414	49,147
Product
Segment Reporting Information [Line Items]
Net sales	156,427	98,755	297,313	206,043
Cost of sales	65,301	43,825	123,917	92,709
Product | TASER
Segment Reporting Information [Line Items]
Net sales	110,637	69,877	207,939	145,052
Cost of sales	37,701	27,242	70,646	57,490
Product | Software and Sensors
Segment Reporting Information [Line Items]
Net sales	45,790	28,878	89,374	60,991
Cost of sales	27,600	16,583	53,271	35,219
Service
Segment Reporting Information [Line Items]
Net sales	62,368	42,504	116,501	82,378
Cost of sales	15,565	9,257	28,615	18,927
Service | TASER
Segment Reporting Information [Line Items]
Net sales	1,891	613	3,588	1,333
Cost of sales	145	0	145	0
Service | Software and Sensors
Segment Reporting Information [Line Items]
Net sales	60,477	41,891	112,913	81,045
Cost of sales	$ 15,420	$ 9,257	$ 28,470	$ 18,927