Business Combinations - Schedule Of Assets Acquired And Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Apr. 30, 2020	Sep. 30, 2019	Jun. 03, 2019	Sep. 30, 2018
Fair value of assets acquired -
Goodwill	$ 114,186		$ 89,241		$ 54,637
Genepoc Inc [Member]
Fair value of assets acquired -
Accounts receivable				$ 57
Inventories				1,511
Other current assets				84
Property, plant and equipment				1,424
Goodwill				34,582
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				78,584
Fair value of liabilities assumed -
Accounts payable and accrued expenses				1,058
Total consideration				77,526
Genepoc Inc [Member] | Licensing Agreements [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				5,990
Genepoc Inc [Member] | Technology-Based Intangible Assets [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				34,136
Genepoc Inc [Member] | Government Grants [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				$ 800
Exalenz [Member]
Fair value of assets acquired -
Cash		$ 5,006
Accounts receivable		637
Inventories		4,329
Other current assets		2,676
Property, plant and equipment		620
Goodwill		24,466
Other intangible assets (estimated useful life):
Right-of-use assets		1,311
Deferred tax assets, net		6,717
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		76,492
Fair value of liabilities assumed -
Accounts payable and accrued expenses		8,008
Long-term lease obligations		1,096
Long-term government grant obligations		10,792
Other non-current liabilities		291
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		20,187
Total consideration	$ 56,305	56,305
Exalenz [Member] | Previously Reported [Member]
Fair value of assets acquired -
Cash		5,006
Accounts receivable		637
Inventories		4,329
Other current assets		851
Property, plant and equipment		544
Goodwill		29,288
Other intangible assets (estimated useful life):
Right-of-use assets		1,358
Deferred tax assets, net		5,566
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		76,199
Fair value of liabilities assumed -
Accounts payable and accrued expenses		7,757
Long-term lease obligations		1,054
Long-term government grant obligations		10,792
Other non-current liabilities		291
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		19,894
Total consideration		56,305
Exalenz [Member] | Measurement Period Adjustments [Member]
Fair value of assets acquired -
Other current assets		1,825
Property, plant and equipment		76
Goodwill		(4,822)
Other intangible assets (estimated useful life):
Right-of-use assets		(47)
Deferred tax assets, net		1,151
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		293
Fair value of liabilities assumed -
Accounts payable and accrued expenses		251
Long-term lease obligations		42
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		293
Exalenz [Member] | Technology-Based Intangible Assets [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		6,120
Exalenz [Member] | Technology-Based Intangible Assets [Member] | Previously Reported [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		5,590
Exalenz [Member] | Technology-Based Intangible Assets [Member] | Measurement Period Adjustments [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		530
Exalenz [Member] | Noncompete Agreements [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		110
Exalenz [Member] | Noncompete Agreements [Member] | Previously Reported [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		120
Exalenz [Member] | Noncompete Agreements [Member] | Measurement Period Adjustments [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		(10)
Exalenz [Member] | Trade Names [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		3,860
Exalenz [Member] | Trade Names [Member] | Previously Reported [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		3,540
Exalenz [Member] | Trade Names [Member] | Measurement Period Adjustments [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		320
Exalenz [Member] | Customer Relationships [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		20,640
Exalenz [Member] | Customer Relationships [Member] | Previously Reported [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		19,370
Exalenz [Member] | Customer Relationships [Member] | Measurement Period Adjustments [Member]
Other intangible assets (estimated useful life):
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 1,270