Revenues - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Unbilled accounts receivable	$ 19,700								$ 19,700
Payment due date from date of invoice									30 days
Net sales	$ 171,851	$ 130,837	$ 112,362	$ 115,810	$ 114,791	$ 104,836	$ 99,226	$ 101,215	$ 530,860	$ 420,068	$ 343,798
Taser 60 Plan
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales									39,300	48,200	40,700
Interest income									1,600	1,300	$ 700
Sales, general and administrative expenses
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Amortization related to deferred commissions									$ 8,200	$ 5,300
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation to be recognized in the next twelve months, percent	20.00%								20.00%
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation to be recognized in the next twelve months, percent	25.00%								25.00%