Equity (Detail) $ in Millions		3 Months Ended			9 Months Ended
	Dec. 09, 2020 shares	Sep. 30, 2021 shares	Dec. 31, 2020 USD ($) shares	Sep. 30, 2020 shares	Sep. 30, 2021 shares	Sep. 30, 2020 shares	Dec. 08, 2020 shares
Equity, Class of Treasury Stock [Line Items]
Common stock, shares issued (in shares)	2,084,596	2,193,000	2,084,000		2,193,000		31,268,943
Common stock, shares authorized (in shares)	4,333,334	4,333,000	4,333,000		4,333,000		65,000,000
Repurchase of common stock (in shares)		0		0	0	0
Reverse stock split, conversion ratio	0.0667
Additional Paid-In Capital
Equity, Class of Treasury Stock [Line Items]
Reduction to additional paid in capital | $			$ 3.4