Common and Preferred Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		12 Months Ended
	Mar. 31, 2021	Feb. 28, 2018	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Class of Stock [Line Items]
Common stock, shares authorized			400,000,000		400,000,000
Common stock, par value			$ 0.01		$ 0.01
Undesignated preferred stock, shares authorized			10,000,000		10,000,000
Undesignated preferred stock, par value			$ 0.01		$ 0.01
Common stock, shares issued			252,413,434		251,477,562
Common stock, shares outstanding			252,413,434		251,477,562
Preferred stock, shares outstanding			0		0
Debt issuance amount	$ 230,000
Proceeds from market price stock purchase plan			$ 684	$ 0
Market price stock purchase plan			252,176
Employee Stock
Class of Stock [Line Items]
Common stock available for issuance			900,000
Convertible Promissory Note | Mann Group
Class of Stock [Line Items]
Conversion of notes accrued interest to common shares, value				400
Debt issuance amount				$ 9,600	$ 9,600
Conversion of notes to common shares, shares				4,000,000	4,000,000
2024 Convertible Notes
Class of Stock [Line Items]
Debt issuance amount				$ 5,000
Conversion of notes to common shares, shares				1,666,667
Common Stock
Class of Stock [Line Items]
Issuance of common stock under Employee Stock Purchase Plan (in shares)			233,401	292,981
Controlled Equity Offering Sales Agreement | Cantor Fitzgerald
Class of Stock [Line Items]
Stock sales agreements date		Feb. 28, 2018
Controlled Equity Offering Sales Agreement | Cantor Fitzgerald | Common Stock | Maximum
Class of Stock [Line Items]
Amount of net proceeds from issuance of securities		$ 50,000
At Market Issuance Sales Agreement
Class of Stock [Line Items]
Sales under sales agreement			$ 0
At Market Issuance Sales Agreement | Cantor Fitzgerald | Common Stock
Class of Stock [Line Items]
Amount of net proceeds from issuance of securities				$ 1,900
Number of shares sold during the period				578,063
At Market Issuance Sales Agreement | Cantor Fitzgerald | Common Stock | Weighted Average
Class of Stock [Line Items]
Exchange price per share	$ 3.26			$ 3.26