Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Payment for contingent consideration liability, operating activities	$ 608,000	$ 2,041,000
Payment for contingent consideration liability, financing activities	2,592,000	$ 9,064,000
Transfers in or out Level 3, Assets	0		$ 0
Transfers in or out Level 3, Liabilities	0		0
Transfers out of Level 1 to Level 2, Assets	0		0
Transfers into Level 1 out of Level 2, Assets	0		0
Transfers out of Level 1 to Level 2, Liabilities	0		0
Transfers into Level 1 out of Level 2, Liabilities	0		$ 0
NorMedix [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration liability	3,200,000
Payment for contingent consideration liability, operating activities	600,000
Payment for contingent consideration liability, financing activities	$ 2,600,000