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Note 9 - Accrued Expenses (Tables)
12 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   
As of September 30,
 
   
2019
   
2018
 
Payroll and employee-related expenses
  $
8,447
     
6,992
 
Accrued property, sales and use tax payable
   
7,761
     
7,043
 
Accrued marketing expenses
   
477
     
335
 
Deferred revenue related to gift card sales
   
1,410
     
1,453
 
Other
   
966
     
2,028
 
Total accrued expenses
  $
19,061
     
17,851