Fair Value Measurements - Additional Information (Detail) - USD ($)	Mar. 18, 2016	Sep. 30, 2018	May 31, 2018	Nov. 10, 2016
Restore Flow Allografts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration			$ 2,000,000	$ 900,000
Restore Flow Allografts [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration				6,000,000
Restore Flow Allografts [Member] | Non-employee Investors [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration				1,100,000
Acquisition-date fair value				900,000
ProCol Biologic Graft [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination consideration calculated, percentage of revenues	10.00%
Additional consideration initial value	$ 300,000
Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value		$ 0
Fair Value, Inputs, Level 3 [Member] | Restore Flow Allografts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-date fair value				1,000,000
Fair Value, Inputs, Level 3 [Member] | Restore Flow Allografts [Member] | Earn Out Payment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration				4,000,000
Fair Value, Inputs, Level 3 [Member] | Restore Flow Allografts [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration				5,100,000
Fair Value, Inputs, Level 3 [Member] | Restore Flow Allografts [Member] | Non-employee Investors [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration				$ 1,100,000
Fair Value, Inputs, Level 3 [Member] | ProCol Biologic Graft [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination consideration calculated, percentage of revenues	10.00%
Additional consideration initial value	$ 300,000