Leases - Additional Information (Detail)		3 Months Ended
	Mar. 08, 2022 USD ($) ft²	Mar. 31, 2022 USD ($) ft² Tranche Lease	Mar. 31, 2021 USD ($)
Disclosure Of Leases [Line Items]
Operating lease weighted average remaining lease term		3 years 1 month 6 days
Operating lease weighted average discount rate		12.50%
Operating lease expense		$ 229,000	$ 213,000
Variable lease cost		3,000	9,000
Operating lease payments		242,000	221,000
Finance lease, amortization expense of ROU asset		34,000
Interest expense on finance lease liability		5,000
Finance lease, operating cash flows		5,000	6,000
Finance lease, financing cash flows		$ 33,000	$ 18,000
Finance lease, weighted average Remaining term		1 year
Finance lease, weighted average discount rate, percent		12.50%
Caladrius [Member]
Disclosure Of Leases [Line Items]
Additional subleased property office area | ft²		1,381
Basking Ridge Office Space [Member]
Disclosure Of Leases [Line Items]
Number of renewal options | Tranche		2
Laboratory Equipment [Member]
Disclosure Of Leases [Line Items]
Number of finance leases | Lease		2
First Lab Equipment [Member]
Disclosure Of Leases [Line Items]
Lease expiration month year		2022-12
Second Lab Equipment [Member]
Disclosure Of Leases [Line Items]
Lease expiration month year		2023-06
Massachusetts [Member] | Maximum [Member]
Disclosure Of Leases [Line Items]
Construction allowance		$ 670,750
Massachusetts [Member] | Original Lease [Member]
Disclosure Of Leases [Line Items]
Area of leased office and laboratory space | ft²		13,650
Original lease term		5 years
Lease expiration month year		2019-04
Massachusetts [Member] | Second Amendment Lease [Member]
Disclosure Of Leases [Line Items]
Lease commencement date		Sep. 10, 2018
Lease term expiration date		May 31, 2025
Additional Space leased | ft²		6,590
Irrevocable standby letter of credit		$ 150,000
Massachusetts [Member] | Third Amendment Lease [Member]
Disclosure Of Leases [Line Items]
Area of leased office and laboratory space | ft²		1,409
Lease commencement date		Jul. 01, 2021
Lease term expiration date		May 31, 2025
Massachusetts [Member] | Fourth Amendment Lease [Member]
Disclosure Of Leases [Line Items]
Area of leased office and laboratory space | ft²	13,650
Lease term expiration date	May 31, 2028
Additional Space leased | ft²	11,999
Termination of property area | ft²	7,999
Massachusetts [Member] | Fourth Amendment Lease [Member] | Maximum [Member]
Disclosure Of Leases [Line Items]
Construction allowance	$ 555,960
NEW JERSEY | Basking Ridge Office Space [Member]
Disclosure Of Leases [Line Items]
Lease expiration month year		2022-06
Area of leased office space | ft²		3,000
Lease inception month year		2017-07
Additional lease renewal option period		5 years
Lease renewal rate at 95% of market rent at time of renewal		95.00%