Convertible Preferred Stock - Schedule of Authorized, Issued and Outstanding Shares of Non-redeemable Convertible Preferred Stock (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Shares Authorized	20,000,000		20,000,000
Series B [Member]
Class Of Stock [Line Items]
Shares Authorized	5,000,000		5,000,000
Shares Outstanding	250,000		250,000
Liquidation Preference	$ 456		$ 441
Series G [Member]
Class Of Stock [Line Items]
Shares Authorized	5,000,000		5,000,000
Shares Outstanding	5,000,000		5,000,000
Liquidation Preference	$ 5,000		$ 5,000
Carrying Value	$ 5		$ 5
Series I-2 [Member]
Class Of Stock [Line Items]
Shares Authorized	4,310		4,310
Shares Outstanding	4,310		4,310
Liquidation Preference	$ 4,310		$ 4,310
Series B, Series G and Series I-2 Non-redeemable Convertible Preferred Stock [Member]
Class Of Stock [Line Items]
Shares Authorized	10,004,310
Shares Outstanding	5,254,310
Liquidation Preference	$ 9,766
Carrying Value	$ 5
Series I-1 [Member]
Class Of Stock [Line Items]
Shares Authorized			2,000
Shares Issued		814
Shares Outstanding		814	814
Liquidation Preference			$ 814
Series B, Series G, Series I-1 and Series I-2 Non-redeemable Convertible Preferred Stock [Member]
Class Of Stock [Line Items]
Shares Authorized	10,004,310		10,006,310
Shares Outstanding			5,255,124
Liquidation Preference			$ 10,565
Carrying Value			$ 5