Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Ordinary shares	Additional paid-in capital	Accumulated other comprehensive loss	Retained Earnings
Balances at Aug. 31, 2018	$ 187,128	$ 678	$ 250,191	$ (175,995)	$ 112,254
Balances, Shares at Aug. 31, 2018		22,480
Share-based compensation expense	4,055		4,055
Issuance of ordinary shares from exercises	2,402	$ 6	2,396
Issuance of ordinary shares from exercises, Shares		210
Issuance of ordinary shares from release of restricted stock units (RSUs)		$ 2	(2)
Issuance of ordinary shares from release of restricted stock units, (RSUs) Shares		55
Issuance of ordinary shares from employee share purchase plan (ESPP)	968	$ 1	967
Issuance of ordinary shares from employee share purchase plan (ESPP), Shares		36
Effect of adopting ASC 606	1,034				1,034
Foreign currency translation	3,102			3,102
Net income (loss)	30,976				30,976
Balances at Nov. 30, 2018	229,665	$ 687	257,607	(172,893)	144,264
Balances, Shares at Nov. 30, 2018		22,781
Balances at Aug. 31, 2018	187,128	$ 678	250,191	(175,995)	112,254
Balances, Shares at Aug. 31, 2018		22,480
Foreign currency translation	(10,268)
Net income (loss)	45,707
Balances at May. 31, 2019	242,080	$ 696	268,652	(186,263)	158,995
Balances, Shares at May. 31, 2019		23,081
Balances at Nov. 30, 2018	229,665	$ 687	257,607	(172,893)	144,264
Balances, Shares at Nov. 30, 2018		22,781
Share-based compensation expense	4,148		4,148
Issuance of ordinary shares from exercises	1,071	$ 3	1,068
Issuance of ordinary shares from exercises, Shares		87
Issuance of ordinary shares from release of restricted stock units (RSUs)		$ 1	(1)
Issuance of ordinary shares from release of restricted stock units, (RSUs) Shares		67
Withholding tax on RSUs	(219)		(219)
Withholding tax on RSUs, Shares		(8)
Foreign currency translation	2,839			2,839
Net income (loss)	12,786				12,786
Balances at Mar. 01, 2019	250,290	$ 691	262,603	(170,054)	157,050
Balances, Shares at Mar. 01, 2019		22,927
Share-based compensation expense	4,433		4,433
Issuance of ordinary shares from exercises	297	$ 1	296
Issuance of ordinary shares from exercises, Shares		28
Issuance of ordinary shares from release of restricted stock units (RSUs)		$ 2	(2)
Issuance of ordinary shares from release of restricted stock units, (RSUs) Shares		52
Withholding tax on RSUs	(11)		(11)
Issuance of ordinary shares from employee share purchase plan (ESPP)	1,335	$ 2	1,333
Issuance of ordinary shares from employee share purchase plan (ESPP), Shares		74
Foreign currency translation	(16,209)			(16,209)
Net income (loss)	1,945				1,945
Balances at May. 31, 2019	242,080	$ 696	268,652	(186,263)	158,995
Balances, Shares at May. 31, 2019		23,081
Balances at Aug. 30, 2019	273,460	$ 712	285,994	(177,866)	164,620
Balances, Shares at Aug. 30, 2019		23,617
Share-based compensation expense	5,956		5,956
Issuance of ordinary shares from exercises	1,166	$ 2	1,164
Issuance of ordinary shares from exercises, Shares		86
Issuance of ordinary shares from release of restricted stock units (RSUs)		$ 2	(2)
Issuance of ordinary shares from release of restricted stock units, (RSUs) Shares		69
Withholding tax on RSUs	(20)		(20)
Withholding tax on RSUs, Shares		(1)
Issuance of ordinary shares from employee share purchase plan (ESPP)	1,242	$ 2	1,240
Issuance of ordinary shares from employee share purchase plan (ESPP), Shares		67
Foreign currency translation	(10,244)			(10,244)
Net income (loss)	224				224
Balances at Nov. 29, 2019	271,784	$ 718	294,332	(188,110)	164,844
Balances, Shares at Nov. 29, 2019		23,838
Balances at Aug. 30, 2019	273,460	$ 712	285,994	(177,866)	164,620
Balances, Shares at Aug. 30, 2019		23,617
Foreign currency translation	(56,768)
Net income (loss)	(8,671)
Balances at May. 29, 2020	264,519	$ 728	342,476	(234,634)	155,949
Balances, Shares at May. 29, 2020		24,144
Balances at Nov. 29, 2019	271,784	$ 718	294,332	(188,110)	164,844
Balances, Shares at Nov. 29, 2019		23,838
Share-based compensation expense	4,647		4,647
Issuance of ordinary shares from exercises	641	$ 1	640
Issuance of ordinary shares from exercises, Shares		49
Issuance of ordinary shares from release of restricted stock units (RSUs)		$ 4	(4)
Issuance of ordinary shares from release of restricted stock units, (RSUs) Shares		117
Withholding tax on RSUs	(351)		(351)
Withholding tax on RSUs, Shares		(11)
Equity component of convertible notes due 2026, net	50,822		50,822
Foreign currency translation	(10,772)			(10,772)
Net income (loss)	(9,720)				(9,720)
Balances at Feb. 28, 2020	307,051	$ 723	350,086	(198,882)	155,124
Balances, Shares at Feb. 28, 2020		23,993
Share-based compensation expense	4,907		4,907
Issuance of ordinary shares from exercises	134		134
Issuance of ordinary shares from exercises, Shares		9
Issuance of ordinary shares from release of restricted stock units (RSUs)		$ 2	(2)
Issuance of ordinary shares from release of restricted stock units, (RSUs) Shares		64
Withholding tax on RSUs	(282)		(282)
Withholding tax on RSUs, Shares		(12)
Issuance of ordinary shares from employee share purchase plan (ESPP)	1,742	$ 3	1,739
Issuance of ordinary shares from employee share purchase plan (ESPP), Shares		90
Reclassification of capped call upon modification of articles of association (See Note 7)	(14,106)		(14,106)
Foreign currency translation	(35,752)			(35,752)
Net income (loss)	825				825
Balances at May. 29, 2020	$ 264,519	$ 728	$ 342,476	$ (234,634)	$ 155,949
Balances, Shares at May. 29, 2020		24,144