Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Concentrations (Details)

v3.21.2
Summary of Significant Accounting Policies - Concentrations (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
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Jun. 30, 2020
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Jun. 30, 2021
USD ($)
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Sep. 30, 2020
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Number of customers     3 3
Number of vendors 3 1 3 1
Allowance for uncollectable accounts receivable | $ $ 0   $ 0  
Vendor 1 | Supplier Concentarion | Purchases        
Concentration risk ( in percentage) 16.00% 12.00% 26.00% 26.00%
Vendor 2 | Supplier Concentarion | Purchases        
Concentration risk ( in percentage) 12.00%   22.00%  
Vendor 3 | Supplier Concentarion | Purchases        
Concentration risk ( in percentage) 12.00%   11.00%  
Customer 1 | Customer Concentration | Accounts Receivable        
Concentration risk ( in percentage)     29.00% 36.00%
Customer 2 | Customer Concentration | Accounts Receivable        
Concentration risk ( in percentage)     25.00% 29.00%
Customer 3 | Customer Concentration | Accounts Receivable        
Concentration risk ( in percentage)     16.00% 10.00%