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Prepaid Expenses and Other Current Assets
 3 Months Ended
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid Expenses and Other Current Assets
Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets consisted of the following (in thousands):

 
 
December 31,
 
September 30,
 
 
2018
 
2018
 
2017
Research and development claims receivable
 
$
10,272

 
$
7,191

 
$
4,069

Prepayments
 
2,069

 
2,208

 
681

VAT receivable
 
1,973

 
1,274

 
248

Other assets
 
—

 
717

 
—

Grant income receivable
 
661

 
678

 
279

Other receivable
 
436

 
121

 
135

Total prepaid expenses and other current assets
 
$
15,411

 
$
12,189

 
$
5,412