Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Oct. 01, 2019
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Net loss	$ (1,342)	$ (1,282)
Weighted-average common shares outstanding (basic and diluted) (in shares)	5,612,000	5,535,000
Net loss per share - basic and diluted (in dollars per share)	$ (0.24)	$ (0.23)
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	194,000	186,000
Operating lease right-of-use assets	$ 17,746		$ 18,059
Operating lease liabilities	$ 17,779		$ 18,059
Restricted Stock
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Anti-dilutive weighted-average common shares excluded from calculation of diluted earnings per share (in shares)	0