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Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) Segment PerformanceObligation shares	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) shares
Summary Of Significant Accounting Policies [Line Items]
Gain (loss) on foreign currency transactions			$ (4,000)	$ 39,000
Contract description			For revenues related to the BARDA contract within the scope of ASC 606, the Company identified two performance obligations: (i) the procurement of 5,614 RECELL units; and (ii) emergency preparedness services.
Cash at deposit institutions	$ 5,800,000		$ 5,800,000		$ 4,100,000
Cash in foreign institutions	697,000		697,000		737,000
Cash equivalents held	$ 31,700,000		$ 31,700,000		$ 14,100,000
Description of maturity terms			We classify all highly liquid investments with original maturities of three months or less from the date of purchase as cash equivalents and all highly liquid investments with stated maturities of greater than three months as marketable securities. The Company classifies marketable securities as short-term when they have remaining contractual maturities of one year or less from the balance sheet date, and as long-term when the investments have remaining contractual maturities of more than one year from the balance sheet date
Final maturity period			37 months
Lease renewal period	3 years		3 years
Contractual term			10 years
Number of business segment \| Segment			1
Number of shares awards deferred, unvested \| shares			165,399		253,048
Deferred compensation arrangement with individual, shares vested \| shares			105,577		17,927
Deferred Compensation Plans
Summary Of Significant Accounting Policies [Line Items]
Employer matching contributions, Vesting period			2 years
Vesting on Year One \| Deferred Compensation Plans
Summary Of Significant Accounting Policies [Line Items]
Employer matching contributions, Vesting percentage			25.00%
Vesting on Year Two \| Deferred Compensation Plans
Summary Of Significant Accounting Policies [Line Items]
Employer matching contributions, Vesting percentage			75.00%
Revenue Benchmark
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, customer	no	no	no	no
Minimum
Summary Of Significant Accounting Policies [Line Items]
Revenue, performance obligation, description of payment terms			30 days
Remaining lease terms	1 year		1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Revenue, performance obligation, description of payment terms			90 days
Remaining lease terms	3 years		3 years
Commercial Customer \| Revenue Benchmark \| Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%
Commercial Customer \| Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, customer			no		one
Commercial Customer \| Accounts Receivable \| Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			10.00%		10.00%
BARDA
Summary Of Significant Accounting Policies [Line Items]
Number of performance obligations \| PerformanceObligation			2
Total transaction price of contract			$ 9,200,000
RECELL system \| BARDA
Summary Of Significant Accounting Policies [Line Items]
Product replacement obligation cost			$ 0
Number of units will be delivered			5,614
Transaction price allocated on a stand alone selling price basis			$ 7,600,000
Emergency Deployment \| BARDA
Summary Of Significant Accounting Policies [Line Items]
Transaction price allocated on a stand alone selling price basis			$ 1,600,000
Emergency Deployment Service \| Commercial Customer \| Revenue Benchmark \| Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	1.00%	1.00%	1.00%	1.00%
Emergency Deployment Service \| BARDA \| Accounts Receivable Revenue \| Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			4.00%		2.00%
General and Administrative Expense
Summary Of Significant Accounting Policies [Line Items]
Gain (loss) on foreign currency transactions	$ (6,000)	$ 7,000	$ (15,000)	$ (8,000)
General and Administrative Expense \| Non-US
Summary Of Significant Accounting Policies [Line Items]
Gain (loss) on foreign currency transactions		$ 69,000	11,000	$ 47,000
Revenue \| RECELL system \| BARDA
Summary Of Significant Accounting Policies [Line Items]
Transaction price allocated on a stand alone selling price basis			$ 1,600,000