Commitments and Contingencies - Additional Information (Detail) $ in Millions		1 Months Ended	12 Months Ended
	Apr. 14, 2017 case	Mar. 31, 2016 lawsuit	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2017 case	Dec. 31, 2017 lawsuit	Sep. 30, 2011 case
Loss Contingencies [Line Items]
Rent expense under operating lease			$ 2.9	$ 1.8	$ 1.0
Open purchase order			51.9
Number of active lawsuits against Company						6	6	55
Letters of credit outstanding amount			2.7
Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding			7.4
Expiring May 2018 | Surety Bond
Loss Contingencies [Line Items]
Letters of credit outstanding amount			2.7
Expiring in 2018 | Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding			1.0
Expiring in 2020 | Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding			0.1
Expiring in 2021 | Surety Bond
Loss Contingencies [Line Items]
Outstanding surety bonds expected to be released during period			2.3
Expiring in 2023 and thereafter | Surety Bond
Loss Contingencies [Line Items]
Outstanding surety bonds expected to be released during period			4.0
Digital Ally
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed, number | lawsuit		2
Digital Ally | Settled Litigation
Loss Contingencies [Line Items]
Number of antitrust claims dismissed | case	6
Digital Ally | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed, number | lawsuit		2
Antoine di Zazzo vs. TASER International, Inc. | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss			$ 0.6
Minimum
Loss Contingencies [Line Items]
Operating leases, term (ranging from less than one year)			1 year
Maximum
Loss Contingencies [Line Items]
Operating leases, term (ranging from less than one year)			6 years