Convertible and Redeemable Series A-2 Preferred Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Apr. 13, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Temporary Equity [Line Items]
Period between issuance and expiration of outstanding warrant	10 years
Proceeds from the Series A-2 and Warrant	$ 175,000
Percentage of dividends accrued	14.20%
Preferred stock, dividends paid		$ 6,970
Compound embedded derivative, change in value		$ (11,007)	$ (7,100)	$ 352
Convertible And Redeemable Series A-2 Preferred Stock
Temporary Equity [Line Items]
Number of shares issued	17,500	17,500	0
Par value per share	$ 0.0001	$ 0.0001	$ 0.0001
Debt issuance costs, net	$ 1,300
Percentage of dividends accrued	15.00%
Preferred stock, dividends paid		$ 7,000
Percentage of discount on common stock market price		15.00%
Percentage of dividend rate steps downs per year		9.00%
Percentage of dividend rate increase per annum in the event of noncompliance		12.00%
Percentage of dividend rate increase per annum upon noncompliance occurred and thereafter		14.00%
Increase in dividend rate		12.00%
Dividend rate thereafter		14.00%
Number of days dividend increase rate applicable noncompliance event occurred		90 days
Number of times increase in debt incurrence test ratio		4.5
Minimum repayment amount		$ 50,000
Minimum repayment amount drop down		$ 25,000
Temporary equity description		The Company may, at its option on any one or more dates, redeem all or a minimum portion (the lesser of (i) $25.0 million in aggregate stated value of the Convertible and Redeemable Series A-2 Preferred Stock and (ii) all of the Convertible and Redeemable Series A-2 Preferred Stock then outstanding) of the outstanding Convertible and Redeemable Series A-2 Preferred Stock in cash. With respect to any redemption of any share of the Convertible and Redeemable Series A-2 Preferred Stock prior to the third-year anniversary, the Company is subject to a make whole penalty in which the holders of the Convertible and Redeemable Series A-2 Preferred Stock are guaranteed a minimum repayment equal to outstanding redeemed stated value plus three years of dividends accrued or accruable thereon.
Aggregate stated value of stock redeemed		$ 25,000
Aggregate liquidation preference		182,200
Compound embedded derivative, fair value net		20,900
Convertible And Redeemable Series A-2 Preferred Stock | Other Expense
Temporary Equity [Line Items]
Compound embedded derivative, change in value		30,200
Convertible And Redeemable Series A-2 Preferred Stock | 60-Day Period Prior to Seventh Anniversary
Temporary Equity [Line Items]
Temporary equity convertible into common stock		60,000
Convertible And Redeemable Series A-2 Preferred Stock | Year 5
Temporary Equity [Line Items]
Temporary equity convertible into common stock		60,000
Convertible And Redeemable Series A-2 Preferred Stock | Year 6
Temporary Equity [Line Items]
Temporary equity convertible into common stock		$ 120,000