Quarterly report pursuant to Section 13 or 15(d)

Business Combinations and Divestiture - Additional Information (Detail)

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Business Combinations and Divestiture - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 13, 2023
Aug. 11, 2022
Jun. 10, 2022
Mar. 01, 2022
Apr. 30, 2024
Sep. 30, 2022
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Business Acquisition [Line Items]                      
Goodwill             $ 79,828,000     $ 80,247,000  
Revenue             31,636,000   $ 30,263,000    
Net income             (25,198,000)   (22,963,000) (58,625,000) $ (25,557,000)
GridBeyond Limited [Member] | Subsequent Event [Member]                      
Business Acquisition [Line Items]                      
Cash proceeds from sale of interest         $ 1,800,000            
Minimum [Member]                      
Business Acquisition [Line Items]                      
Contingent earnout           $ 10,825,000          
Broadbean Acquisition [Member]                      
Business Acquisition [Line Items]                      
Cash payment $ 53,301,000                    
Tax deductible goodwill, acquisition 3,728,000                    
Goodwill 32,923,000                    
Property, equipment and improvements, net 343,000                    
Other non-current liabilities 6,618,000                    
Other assets 3,486,000                    
Total intangible assets 27,500,000                    
Deferred tax liability 3,741,000                    
Goodwill deductible for tax purposes $ 3,728,000                    
Broadbean Acquisition [Member] | Maximum [Member]                      
Business Acquisition [Line Items]                      
Estimated useful lives 5 years                    
Broadbean Acquisition [Member] | Minimum [Member]                      
Business Acquisition [Line Items]                      
Estimated useful lives 4 years                    
Broadbean Acquisition [Member] | Developed Technology [Member]                      
Business Acquisition [Line Items]                      
Estimated useful lives 4 years                    
Total intangible assets $ 10,300,000                    
VSL Acquisition [Member]                      
Business Acquisition [Line Items]                      
Business acquisition, effective date of acquisition   Aug. 11, 2022                  
VocaliD [Member]                      
Business Acquisition [Line Items]                      
Business acquisition, effective date of acquisition     Jun. 10, 2022                
Cash payment               $ 1,000,000      
March 2022 Acquisition [Member]                      
Business Acquisition [Line Items]                      
Business acquisition, effective date of acquisition       Mar. 01, 2022              
Business acquisition, percentage of ownership interests acquired       100.00%              
Cash payment             $ 1,500,000   $ 1,500,000    
March 2022 Acquisition [Member] | Maximum [Member]                      
Business Acquisition [Line Items]                      
Contingent earnout consideration       $ 4,500,000              
Energy Divestiture [Member]                      
Business Acquisition [Line Items]                      
Disposal group including discontinued operation consideration               549,000      
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]             Nonoperating Income (Expense)        
Pre-tax Gain               $ 2,572,000      
Energy Divestiture [Member] | GridBeyond Limited [Member] | Subsequent Event [Member]                      
Business Acquisition [Line Items]                      
Cash proceeds from sale of interest         $ 1,800,000            
Energy Divestiture [Member] | Series B Preferred Stock [Member]                      
Business Acquisition [Line Items]                      
Number of shares received from divestiture of business               4,160,644      
Disposal group including discontinued operation consideration               $ 2,021,000      
Stock Purchase Agreement [Member] | Broadbean Acquisition [Member]                      
Business Acquisition [Line Items]                      
Business acquisition, effective date of acquisition Jun. 13, 2023                    
Business acquisition, percentage of ownership interests acquired 100.00%                    
Business acquisition, name of acquired entity Broadbean Technology Pty Ltd                    
Total consideration $ 53,301,000                    
Cash payment $ 53,301,000                    
Acquisition related expenses                   $ 4,214,000