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Goodwill and other Identifiable Intangible Assets (Tables)
12 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Amortizable Identifiable Intangible Assets
Amortizable identifiable intangible assets, net as of September 30, 2020 and 2019 were comprised of the following (in thousands):
 September 30, 2020September 30, 2019
Gross
carrying
amount
Accum.
amort.
NetGross
carrying
amount
Accum.
amort.
Net
Purchased and core technology$76,011 $(55,482)$20,529 $57,699 $(50,986)$6,713 
License agreements112 (112)— 102 (74)28 
Patents and trademarks22,836 (13,535)9,301 14,577 (11,970)2,607 
Customer relationships125,500 (34,232)91,268 46,315 (25,266)21,049 
Non-compete agreements600 (450)150 600 (330)270 
Order backlog— — — 1,800 (1,800)— 
Total$225,059 $(103,811)$121,248 $121,093 $(90,426)$30,667 
Schedule of Amortization Expense
Amortization expense for fiscal years 2020, 2019 and 2018 was as follows (in thousands):
Fiscal yearTotal
2020$14,754 
2019$8,818 
2018$9,435 
Schedule of Estimated Future Amortization Expense Related to Identifiable Intangible Assets
Estimated amortization expense for the next five years is as follows (in thousands):
Fiscal yearTotal
2021$15,558 
2022$14,714 
2023$12,518 
2024$11,815 
2025$8,358 
Schedule of Changes in Carrying Amount of Goodwill
The changes in the carrying amount of goodwill by reportable segments are (in thousands):
 IoT
Products & Services
IoT
Solutions
Total
Balance on September 30, 2018$104,358 $50,177 $154,535 
Foreign currency translation adjustment(839)(274)(1,113)
Balance on September 30, 2019$103,519 $49,903 $153,422 
Acquisition56,242 — 56,242 
Foreign currency translation adjustment604 (133)471 
Balance at September 30, 2020$160,365 $49,770 $210,135