Recently Issued and Adopted Accounting Standards - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Oct. 01, 2019	Sep. 30, 2019	Sep. 30, 2020
Operating lease right-of-use  assets	$ 700		$ 276
Lease liabilities	800		$ 330
Increase decrease in deferred rent	$ 100	$ (50)