Prepaids and Other Current Assets and Other Long-Term Assets - Summary of Prepaids and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2021
Prepaids And Other Current Assets And Other Long Term Assets [Abstract]
Prepaid expenses	$ 921	$ 1,124	$ 853
Lease deposits	110	2
Accrued investment income	168	72
BARDA contract costs	252
Other receivables	127	15	480
Total prepaids and other current assets	$ 1,578	$ 1,213	$ 1,333