XML 15 R37.htm IDEA: XBRL DOCUMENT v3.20.1
Goodwill and Intangible Assets - Amortization Expense Associated with Intangible Assets (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]        
Amortization expense of intangible assets $ 1,202 $ 1,503 $ 2,998 $ 3,005
Completed Technology        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense of intangible assets 463 494 1,038 988
Customer Contracts [Member]        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense of intangible assets 658 1,009 1,798 2,017
Trade Names [Member]        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense of intangible assets 38 0 75 0
Noncompete Agreements [Member]        
Finite-Lived Intangible Assets [Line Items]        
Amortization expense of intangible assets $ 43 $ 0 $ 87 $ 0