Summary of Significant Accounting Policies - Noncontrolling Interests (Details) $ in Thousands, $ in Millions			3 Months Ended	21 Months Ended
	Sep. 01, 2018 USD ($) shares	Sep. 01, 2018 TWD ($) shares	May 31, 2022 shares	Sep. 30, 2020 shares	Aug. 31, 2021 shares	Aug. 31, 2018 shares
Minority Interest [Line Items]
Common stock, shares issued			4,530,000		4,460,000
Taiwan Bandaoti Zhaoming Co., Ltd.
Minority Interest [Line Items]
Common stock issued during period, shares	414,000	414,000
Common stock, shares issued	12,501,715	12,501,715				12,087,715
Common stock issued during period, value	$ 176	$ 5.4
Noncontrolling interest (as percentage)	3.31%	3.31%	2.63%			0.00%
Taiwan Bandaoti Zhaoming Co., Ltd. | Taiwan SemiLEDs
Minority Interest [Line Items]
Common shares purchased form non-controlling interests			52,000	33,000