Reportable Segments and Major Concentration Data - Additional Information (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2020 USD ($) Customer	Sep. 30, 2019 USD ($) Customer	Sep. 30, 2018 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 64,153	$ 84,797	$ 57,296	$ 47,421	$ 50,846	$ 48,440	$ 50,248	$ 51,480	$ 253,667	$ 201,014	$ 213,571
Identifiable assets	$ 5,000								5,000
Diagnostics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$ 121,132	$ 136,682	$ 150,454
Sales Revenue, Net [Member] | Covid 19 Products [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									28.00%
Two Diagnostic Distributor Customers [Member] | Diagnostics [Member] | Segment Level [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									23.00%
Two Diagnostic Distributor Customers [Member] | Diagnostics [Member] | Consolidated Level [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									12.00%
Three Diagnostic Manufacturers [Member] | Life Science [Member] | Segment Level [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									27.00%
Three Diagnostic Manufacturers [Member] | Life Science [Member] | Consolidated Level [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									14.00%
Customer Concentration Risk [Member] | One Diagnostic Manufacturing Customers [Member] | Consolidated Accounts Receivable [Member] | Life Science [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									15.00%
Customer Concentration Risk [Member] | Two Diagnostic Distributor Customers [Member] | Consolidated Accounts Receivable [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of major customers | Customer									1	1
Concentration risk percentage										11.00%
Customer Concentration Risk [Member] | Two Diagnostic Distributor Customers [Member] | Sales Revenue, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of major customers | Customer									2
Customer Concentration Risk [Member] | Customer A [Member] | Sales Revenue, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage											10.00%
Customer Concentration Risk [Member] | Customer B [Member] | Sales Revenue, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage											11.00%
Foreign Customers, Combined International for Diagnostics and Life Science [Member] | Sales Revenue, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$ 121,596	$ 74,193	$ 71,494
Product Concentration Risk [Member] | Sales Revenue, Net [Member] | Three Product Families [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage									39.00%	57.00%	59.00%