Annual report pursuant to Section 13 and 15(d)

Schedule I - Parent Company Financial Information - Summary Of Condensed Statements Of Cash Flows (Detail)

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Schedule I - Parent Company Financial Information - Summary Of Condensed Statements Of Cash Flows (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities                
Net loss   $ (8,331) $ (12,787) $ (31,222) $ (39,966) $ (24,453) $ (35,201) $ (23,443)
Adjustments to reconcile net loss to net cash provided by operating activities                
Change in fair value of warrant liability           (5,267) 7,485 (235)
Cash provided by investing activities           (14,758) 26,471 14,253
Cash flows from investing activities                
Net cash used in investing activities           (13,419) (11,603) (50,370)
Cash flows from financing activities                
Repurchase of common stock             (200) (80)
Issuance of common stock, net of transaction costs $ 63,200              
Settlements of preferred shares           (229,915)    
Cash used in financing activities           104,053 (12,718) 36,998
Effect of exchange rate change on cash and cash equivalents           (226) (149) (162)
Change in Cash and Cash Equivalents and Restricted Cash           75,650 2,001 719
Cash and Cash Equivalents and Restricted Cash, beginning of period       10,693 8,692 10,693 8,692 7,973
Cash and Cash Equivalents and Restricted Cash, end of period           86,343 10,693 8,692
Non-cash investing and financing activities:                
Equity issued for acquisition of Integron, LLC           56,502   7,000
Parent Company [Member]                
Cash flows from operating activities                
Net loss           (23,910) (35,201) (23,443)
Adjustments to reconcile net loss to net cash provided by operating activities                
Equity in net loss of unconsolidated subsidiaries           29,177 27,716 23,678
Change in fair value of warrant liability           (5,267) 7,485 (235)
Cash provided by investing activities           0 0 0
Cash flows from investing activities                
Distribution from subsidiary           5,947 200 80
Net cash used in investing activities           5,947 200 80
Cash flows from financing activities                
Repurchase of common stock           0 (200) (80)
Issuance of common stock, net of transaction costs           223,968    
Settlements of preferred shares           (229,915)    
Cash used in financing activities           (5,947) (200) (80)
Effect of exchange rate change on cash and cash equivalents           0 0 0
Change in Cash and Cash Equivalents and Restricted Cash           0 0 0
Cash and Cash Equivalents and Restricted Cash, beginning of period       $ 0 $ 0 0 0 0
Cash and Cash Equivalents and Restricted Cash, end of period           0 0 0
Non-cash investing and financing activities:                
Equity issued for acquisition of Integron, LLC           0 0 7,000
Share-based payment awards issued to employees of subsidiaries           $ 1,839 $ 1,161 $ 1,682