Series 1 Nonconvertible Preferred Stock and Warrants - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Nov. 30, 2010
Class of Stock [Line Items]
Fair value of the Series 1 nonconvertible preferred stock	$ 1,628	$ 1,628
Series 1 Nonconvertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Shares authorized	2,000,000
Par value of outstanding convertible preferred stock	$ 0.01
Per share value adjusted for stock dividend	1.00
Preferred stock redemption price per share	$ 1.00
Redemption period	60 days
Number of shares issuable upon exercise of the warrants				2,000,000
Warrant expiration date	Oct. 04, 2017
Preferred stock, shares outstanding	1,930,000	1,930,000
Change in fair value of warrants	$ 0	$ (59)	$ (159)
Fair value of the Series 1 nonconvertible preferred stock	$ 1,628	$ 1,628