Revenues - Schedule Of Contract Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Current	$ 119,827	$ 117,864
Long-Term	91,886	87,936
Total	211,713	205,800
TASER
Disaggregation of Revenue [Line Items]
Current	27,648	22,578
Long-Term	32,663	32,611
Total	60,311	55,189
Software and Sensors
Disaggregation of Revenue [Line Items]
Current	92,179	95,286
Long-Term	59,223	55,325
Total	151,402	150,611
Warranty
Disaggregation of Revenue [Line Items]
Current	23,849	22,568
Long-Term	19,916	21,534
Total	43,765	44,102
Warranty | TASER
Disaggregation of Revenue [Line Items]
Current	12,963	12,716
Long-Term	15,469	16,378
Total	28,432	29,094
Warranty | Software and Sensors
Disaggregation of Revenue [Line Items]
Current	10,886	9,852
Long-Term	4,447	5,156
Total	15,333	15,008
Hardware
Disaggregation of Revenue [Line Items]
Current	31,239	31,804
Long-Term	51,963	49,227
Total	83,202	81,031
Hardware | TASER
Disaggregation of Revenue [Line Items]
Current	14,097	9,569
Long-Term	15,901	15,468
Total	29,998	25,037
Hardware | Software and Sensors
Disaggregation of Revenue [Line Items]
Current	17,142	22,235
Long-Term	36,062	33,759
Total	53,204	55,994
Software and Sensors
Disaggregation of Revenue [Line Items]
Current	64,739	63,492
Long-Term	20,007	17,175
Total	84,746	80,667
Software and Sensors | TASER
Disaggregation of Revenue [Line Items]
Current	588	293
Long-Term	1,293	765
Total	1,881	1,058
Software and Sensors | Software and Sensors
Disaggregation of Revenue [Line Items]
Current	64,151	63,199
Long-Term	18,714	16,410
Total	$ 82,865	$ 79,609