Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Details)

v3.19.3.a.u2
Fair Value Measurements - Additional Information (Details) - USD ($)
Sep. 30, 2019
Sep. 30, 2018
Recurring Basis    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Financial liabilities, fair value $ 0 $ 0