v3.23.1
Summary of significant accounting policies - Additional Information (Details)
 12 Months Ended
Sep. 30, 2022
USD ($)
segment
reporting_unit
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Restricted cash, non-current $ 1,572,000 $ 1,530,000  
Credit period granted to customers 30 days    
Depreciation and amortization expense $ 16,514,000 9,750,000 $ 6,677,000
Capitalized computer software, net 5,300,000 3,000,000  
Impairment of long lived assets $ 0 0 0
Number of reporting units | reporting_unit 1    
Number of reportable segments | segment 1    
Number of operating segments | segment 1    
Contract assets $ 3,400,000 2,000,000  
Contract liabilities 3,500,000 1,100,000  
Recognized revenue 1,100,000    
Performance obligation amount 4,500,000    
Advertising and promotion expenses 2,400,000 2,500,000 1,200,000
Georgia Institute of Technology | Development of DNA Synthesis Portion of the Molecular Information Storage      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Total expected cost of project 7,200,000    
Commitment to contribute towards project cost 2,000,000    
Georgia Institute of Technology | Development of DNA Synthesis Portion of the Molecular Information Storage | United States Director Of Central Intelligence      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Grant receivable for the project 5,200,000    
Research and development portion of the grant received and recognized $ 900,000 $ 1,100,000 $ 2,500,000