Segment Data - Summary of Operational Information Relative to the Company's Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Product sales	$ 40,025	$ 35,197	$ 32,175	$ 30,434	$ 32,116	$ 28,773	$ 28,223	$ 25,641	$ 136,123	$ 114,126	$ 89,676
Service revenue									1,708	627	352
Net sales									137,831	114,753	90,028
Cost of products sold									50,099	43,123	36,906
Cost of services delivered									1,889	3,915	4,847
Excess inventory charges											3,746
Gross margin	25,554	22,096	19,742	18,451	19,168	16,803	16,503	15,241	85,843	67,715	44,529
Sales, general & administrative									46,584	39,086	38,001
Research & development									9,888	8,139	9,989
Litigation judgment (recovery)									1,450	(2,200)	3,301
Loss on impairment											1,354
Gain (Loss) on write down / disposal of property and equipment, net									(27)	161	2,800
Income (loss) from operations									27,948	22,529	(10,916)
Purchase of property and equipment									1,783	1,334	1,854
Purchase of intangible assets									323	429	413
Depreciation and amortization									5,131	6,519	8,097
TASER Weapons [Member]
Segment Reporting Information [Line Items]
Product sales									127,474	109,055	86,675
Service revenue
Net sales									127,474	109,055	86,675
Cost of products sold									44,025	39,350	34,213
Cost of services delivered
Excess inventory charges											1,749
Gross margin									83,449	69,705	50,713
Sales, general & administrative									40,201	35,576	34,794
Research & development									4,311	3,938	5,445
Litigation judgment (recovery)									1,450	(2,200)	3,301
Loss on impairment											1,354
Gain (Loss) on write down / disposal of property and equipment, net									(27)	161	643
Income (loss) from operations									37,514	32,230	5,176
Purchase of property and equipment									1,324	922	1,501
Purchase of intangible assets									307	429	413
Depreciation and amortization									4,011	4,327	5,409
Evidence.com & Video [Member]
Segment Reporting Information [Line Items]
Product sales									8,649	5,071	3,001
Service revenue									1,708	627	352
Net sales									10,357	5,698	3,353
Cost of products sold									6,074	3,773	2,693
Cost of services delivered									1,889	3,915	4,847
Excess inventory charges											1,997
Gross margin									2,394	(1,990)	(6,184)
Sales, general & administrative									6,383	3,510	3,207
Research & development									5,577	4,201	4,544
Litigation judgment (recovery)
Loss on impairment
Gain (Loss) on write down / disposal of property and equipment, net											2,157
Income (loss) from operations									(9,566)	(9,701)	(16,092)
Purchase of property and equipment									459	412	353
Purchase of intangible assets									16
Depreciation and amortization									$ 1,120	$ 2,192	$ 2,688