Commitments and Contingencies - Additional Information (Detail)	1 Months Ended		3 Months Ended			9 Months Ended			12 Months Ended	48 Months Ended
	Jul. 31, 2019 USD ($)	Nov. 30, 2017 USD ($) ft²	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($) € / $	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) € / $	Jun. 30, 2019 EUR (€)	Jun. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2023 USD ($)
Commitments And Contingencies [Line Items]
Settlement of claim						$ 400,000
License agreement commencement date						2006-03	2006-03
Annual minimum payments for licenses						$ 227,000	€ 200,000
Exchange rate relating to license payment | € / $				1.137		1.137
Future minimum payments associated with license				$ 1,900,000		$ 1,900,000
Rent expense related to operating leases				100,000	$ 100,000	400,000		$ 200,000
Other long-term liabilities				4,755,000		$ 4,755,000			$ 5,720,000
Acquisition charge for in-process of research and development					$ 7,888,000			$ 7,888,000
Eden Prairie Minnesota [Member]
Commitments And Contingencies [Line Items]
Square feet facility | ft²		36,000
Operating lease agreement term		10 years
Operating lease agreement commencement date		2018-05
Amount deposited into restricted cash account		$ 400,000
Patents [Member]
Commitments And Contingencies [Line Items]
Patent expiry date						2027-09	2027-09
Intellectual Property [Member] | Medical Device [Member]
Commitments And Contingencies [Line Items]
Contingency period ending year						2022	2022
Intellectual Property [Member] | Medical Device [Member] | Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Payments to acquire intellectual property assets	$ 800,000
Contingent payments upon achievement of regulatory milestones	1,300,000
Estimated additional payment to acquire intellectual property assets	$ 200,000
Intellectual Property [Member] | Scenario Forecast [Member] | Medical Device [Member]
Commitments And Contingencies [Line Items]
Acquisition charge for in-process of research and development			$ 900,000
Intellectual Property [Member] | Embolitech LLC [Member]
Commitments And Contingencies [Line Items]
Payments to acquire intellectual property assets						$ 5,000,000
Installment payment beginning period						2020-01	2020-01
Installment payment ending period						2023-12	2023-12
Contingent payments upon achievement of regulatory milestones						$ 2,000,000
Contingency period ending year						2033	2033
Other long-term liabilities				2,100,000		$ 2,100,000			2,900,000
Other current liabilities				$ 1,000,000		1,000,000
Intellectual Property [Member] | Embolitech LLC [Member] | Scenario Forecast [Member]
Commitments And Contingencies [Line Items]
Estimated additional payment to acquire intellectual property assets										$ 3,500,000
Selling, general and administrative [Member]
Commitments And Contingencies [Line Items]
Claim accrual recorded in selling, general and other administrative expenses									1,000,000
Reduction in selling,general and administrative expenses						$ 600,000
Other Accrued Liabilities [Member]
Commitments And Contingencies [Line Items]
Claim accrual recorded in other accrued liabilities									$ 1,000,000