Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total Stockholders' Deficit Controlling Interest	Total Stockholders' Deficit Non-controlling Interest	Initial Public Offering	Initial Public Offering Common Stock	Initial Public Offering Additional Paid-In Capital	Initial Public Offering Total Stockholders' Deficit Controlling Interest	Series A Redeemable Convertible Preferred Stock	Series B Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock, Beginning balance (in shares) at Feb. 28, 2013												10,050,254	7,575,973
Redeemable convertible preferred stock, Beginning balance at Feb. 28, 2013												$ 40,010	$ 127,544
Beginning balance (in shares) at Feb. 28, 2013		28,091,081
Beginning balance at Feb. 28, 2013	$ (259,620)	$ 28	$ 23,080	$ (1,112)	$ (279,131)	$ (257,135)	$ (2,485)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in connection with initial public offering, net of offering costs (in shares)									4,761,000
Issuance of common stock in connection with initial public offering, net of offering costs								$ 75,490	$ 5	$ 75,485	$ 75,490
Conversion of convertible preferred stock to common stock in connection with initial public offering (in shares)		17,626,227										(10,050,254)	(7,575,973)
Conversion of convertible preferred stock to common stock in connection with initial public offering	167,554	$ 18	167,536			167,554						$ (40,010)	$ (127,544)
Issuance of common stock (in shares)		769,191
Issuance of common stock	3,310	$ 1	3,309			3,310
Tax withholding related to net share settlement of equity awards (in shares)		(158,049)
Tax withholding related to net share settlement of equity awards	(3,101)		(3,101)			(3,101)
Repurchase of common stock (in shares)		(44,254)
Repurchase of common stock	(723)		(39)		(684)	(723)
Stock-based compensation	10,837		10,837			10,837
Excess tax benefits from equity compensation plans	1,513		1,513			1,513
Repayment of employee loans, net	3,048		3,048			3,048
Options assumed in acquisition	129		129			129
Non-controlling interest			(3,246)			(3,246)	3,246
Change in unrealized gain (loss) on available-for-sale securities, net of tax effect	(57)			(57)		(57)
Foreign currency translation adjustment	352			352		352
Net loss attributable to Barracuda Networks, Inc.	(3,626)
Net loss	(4,387)				(3,626)	(3,626)	$ (761)
Redeemable convertible preferred stock, Ending balance (in shares) at Feb. 28, 2014													0
Redeemable convertible preferred stock, Ending balance at Feb. 28, 2014													$ 0
Ending balance (in shares) at Feb. 28, 2014		51,045,196
Ending balance at Feb. 28, 2014	(5,655)	$ 52	278,551	(817)	(283,441)	(5,655)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		2,012,749
Issuance of common stock	16,476	$ 1	16,475			16,476
Tax withholding related to net share settlement of equity awards (in shares)		(176,943)
Tax withholding related to net share settlement of equity awards	(5,369)		(5,369)			(5,369)
Stock-based compensation	17,058		17,058			17,058
Excess tax benefits from equity compensation plans	8,947		8,947			8,947
Repayment of employee loans, net	373		373			373
Change in unrealized gain (loss) on available-for-sale securities, net of tax effect	(8)			(8)		(8)
Foreign currency translation adjustment	(3,408)			(3,408)		(3,408)
Net loss attributable to Barracuda Networks, Inc.	(67,498)
Net loss	$ (67,498)				(67,498)	(67,498)
Ending balance (in shares) at Feb. 28, 2015	52,881,002	52,881,002
Ending balance at Feb. 28, 2015	$ (39,084)	$ 53	316,035	(4,233)	(350,939)	(39,084)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)	382,529	1,019,686
Issuance of common stock	$ 4,845	$ 1	4,844			4,845
Tax withholding related to net share settlement of equity awards (in shares)		(262,511)
Tax withholding related to net share settlement of equity awards	$ (6,734)		(6,734)			(6,734)
Repurchase of common stock (in shares)	(1,503,000)	(1,502,983)
Repurchase of common stock	$ (19,216)	$ (2)	(9,495)		(9,719)	(19,216)
Stock-based compensation	28,846		28,846			28,846
Excess tax benefits from equity compensation plans	3,788		3,788			3,788
Repayment of employee loans, net	155		155			155
Change in unrealized gain (loss) on available-for-sale securities, net of tax effect	393			393		393
Foreign currency translation adjustment	(669)			(669)		(669)
Net loss attributable to Barracuda Networks, Inc.	(4,422)
Net loss	$ (4,422)					(4,422)
Ending balance (in shares) at Feb. 29, 2016	52,135,194	52,135,194
Ending balance at Feb. 29, 2016	$ (32,098)	$ 52	$ 337,439	$ (4,509)	$ (365,080)	$ (32,098)