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Basis of Presentation and Significant Accounting Policies (Tables)
 6 Months Ended
Mar. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]  
Summary of Research, Development and Engineering Expense The table below shows gross research and development expenses and grants earned, in thousands:

 

 

Three Months Ended March 31,

 

 

Six Months Ended March 31,

 

 

 

2021

 

 

2020

 

 

2021

 

 

2020

 

Research, development and engineering

 

$

1,869

 

 

$

1,017

 

 

$

3,114

 

 

$

1,780

 

Grants earned

 

 

—

 

 

 

(102

)

 

 

—

 

 

 

(243

)

Net research, development and engineering

 

$

1,869

 

 

$

915

 

 

$

3,114

 

 

$

1,537