Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2017
SEYCHELLES | Grant
Other Commitments [Line Items]
Regulated Operating Revenue, Other			$ 800
Period For Which The Performance Obligation Must Be Maintained			5 years
Royalty Agreement On Future Sales
Other Commitments [Line Items]
Payment of Royalties	$ 142	$ 155