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Summary of Significant Accounting Policies - Summary of Disaggregation of Revenue by Reportable Segment and Geographic Region (Detail) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 253,667 $ 201,014 $ 213,571
Revenue, % change 26.00% (6.00%)  
Diagnostics [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 121,132 $ 136,682 150,454
Revenue, % change (11.00%) (9.00%)  
Diagnostics [Member] | Americas [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 97,228 $ 110,109 123,916
Revenue, % change (12.00%) (11.00%)  
Diagnostics [Member] | EMEA [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 21,826 $ 23,888 23,922
Revenue, % change (9.00%)    
Diagnostics [Member] | ROW [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 2,078 $ 2,685 2,616
Revenue, % change (23.00%) 3.00%  
Life Science [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 132,535 $ 64,332 63,117
Revenue, % change 106.00% 2.00%  
Life Science [Member] | Americas [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 37,391 $ 19,441 21,080
Revenue, % change 92.00% (8.00%)  
Life Science [Member] | EMEA [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 58,125 $ 28,850 24,715
Revenue, % change 101.00% 17.00%  
Life Science [Member] | ROW [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue $ 37,019 $ 16,041 $ 17,322
Revenue, % change 131.00% (7.00%)