Summary of Accounting Policies - Additional Information (Details)		3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 02, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) Customer	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)
Summary Of Accounting Policies [Line Items]
Accounts receivable, allowance for credit loss, write-offs				$ 0
Goodwill		$ 8,454,000		8,454,000		$ 8,454,000
Impairment of finite lived intangible assets		0	$ 0	0	$ 0
Fair value, assets, level 1 to level 2 transfers, amount		0		0
Fair value, assets, level 2 to level 1 transfers, amount		0		0
Fair value, liabilities, level 1 to level 2 transfers, amount		0		0
Fair value, liabilities, level 2 to level 1 transfers, amount		0		0
Fair value, measurement with unobservable inputs reconciliation, asset, transfers into level 3				0
Fair value, measurement with unobservable inputs reconciliation, asset, transfers out of level 3				0
Fair value, measurement with unobservable inputs reconciliation, liability, transfers into level 3				0	0
Fair value, measurement with unobservable inputs reconciliation, liability, transfers out of level 3				$ 0	0
Revenue, practical expedient, incremental cost of obtaining contract [true false]				true
Revenue recognized				$ 900,000	$ 500,000
Dividend yield				0.00%
Maximum
Summary Of Accounting Policies [Line Items]
Cash and cash equivalents, FDIC insured amount		250,000		$ 250,000
Finite-lived intangible assets, estimated useful life				10 years
Minimum
Summary Of Accounting Policies [Line Items]
Finite-lived intangible assets, estimated useful life				5 years
Customer Concentration Risk | Accounts Receivable
Summary Of Accounting Policies [Line Items]
Number of customer accounted for accounts receivable | Customer				1
Customer Concentration Risk | Accounts Receivable | One Customer
Summary Of Accounting Policies [Line Items]
Concentration risk, percentage				14.00%
GentleWave Systems | Maximum
Summary Of Accounting Policies [Line Items]
Standard product warranty period				2 years	2 years
TDO Software, Inc.
Summary Of Accounting Policies [Line Items]
Goodwill		8,500,000		$ 8,500,000
Goodwill impairment						$ 0
TDO Software, Inc. | Endodontic Treatment | Patents
Summary Of Accounting Policies [Line Items]
Finite-lived intangible assets acquired							$ 1,300,000
Finite-lived intangible assets, estimated useful life				10 years
Prepaid Expenses and Other Current Assets
Summary Of Accounting Policies [Line Items]
Deferred offering costs		$ 1,900,000		$ 1,900,000
Subsequent Event
Summary Of Accounting Policies [Line Items]
Deferred offering costs reclassified to additional paid-in capital	$ 1,900,000