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Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Components of Deferred Profit
The components of deferred profit are as follows, in thousands:
 
 
June 30,
2018
 
September 30,
2017
Deferred revenues
$
6,172

 
$
6,822

Deferred costs
2,612

 
2,741

Deferred profit
$
3,560

 
$
4,081
Research and Development Expense
The table below shows gross research and development expenses and grants earned, in thousands:
 
 
Three Months Ended June 30,
 
Nine Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
Research, development and engineering
$
2,284

 
$
1,774

 
$
7,102

 
$
5,547

Grants earned
(162
)
 
(351
)
 
(807
)
 
(961
)
    Net research, development and engineering
$
2,122

 
$
1,423

 
$
6,295

 
$
4,586