Annual report pursuant to Section 13 and 15(d)

Revision of Previously Issued Financial Statements (Unaudited) - Summary of Revision to Company's Previous Unaudited Quarterly Financial Statements (Details)

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Revision of Previously Issued Financial Statements (Unaudited) - Summary of Revision to Company's Previous Unaudited Quarterly Financial Statements (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Jun. 30, 2023
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Prior Period Adjustments Restatement [Line Items]                
Total current liabilities         $ 19,663 $ 17,807    
Deferred revenue         256 418    
Warranty accrual         593 360 $ 521  
Non current term loans, net of discount         11,782 13,091    
Non current operating lease liability         772 1,259    
Other liabilities         79 362    
Total liabilities         33,145 33,297    
Stockholders' equity:                
Common stock, par value $0.001 per share         3 0    
Additional paid-in capital, common stock         317,103 301,790    
Accumulated other comprehensive loss         (553) (733)    
Accumulated deficit         (316,800) (296,168)    
Total stockholders' equity         (247) 4,889 25,208 $ 10,028
Total liabilities and stockholders' equity         35,101 38,186    
Loss from operations         (17,937) (25,338) (16,431)  
Loss on foreign currency transactions         (351) (438) (452)  
Interest expense, net         (2,361) (2,749) (2,224)  
Gain on debt forgiveness         0 0 3,014  
Other income, net         48 0 0  
Non-operating gain (loss), net         (2,664) (3,187) 338  
Loss before income tax provision         (20,601) (28,525) (16,093)  
Income tax provision         (31) (109) (65)  
Net Income (Loss)         (20,632) (28,634) (16,158)  
Other comprehensive loss items:                
Foreign currency translation adjustments         180 (110) (238)  
Comprehensive loss         (20,452) (28,744) (16,396)  
Deemed dividend on convertible preferred stock         (16,987) (217) (546)  
Net loss attributable to common stockholders         $ (37,619) $ (28,851) $ (16,704)  
Net loss per share attributable to common stockholders:                
Basic         $ (29.44) $ (418.13) $ (283.12)  
Diluted         $ (29.44) $ (418.13) $ (283.12)  
Shares used in the calculation of net loss per share:                
Basic         1,278 69 59  
Diluted         1,278 69 59  
As Previously Reported [Member]                
Stockholders' equity:                
Net Income (Loss) $ (4,589) $ (4,868) $ (10,717) $ (15,306)        
Other comprehensive loss items:                
Deemed dividend on convertible preferred stock 0 0 0 0        
Net loss attributable to common stockholders $ (4,589) $ (4,868) $ (10,717) $ (15,306)        
Net loss per share attributable to common stockholders:                
Basic $ (3.89) $ (8.93) $ (24.52) $ (22.28)        
Diluted $ (3.89) $ (8.93) $ (24.52) $ (22.28)        
Shares used in the calculation of net loss per share:                
Basic 1,179 545 437 687        
Diluted 1,179 545 437 687        
Adjustment [Member]                
Stockholders' equity:                
Net Income (Loss) $ 0 $ 0 $ 0 $ 0        
Other comprehensive loss items:                
Deemed dividend on convertible preferred stock (7,610) (9,377) (9,377) (16,987)        
Net loss attributable to common stockholders $ (7,610) $ (9,377) $ (9,377) $ (16,987)        
Net loss per share attributable to common stockholders:                
Basic $ (0) $ 0 $ (0) $ (0)        
Diluted $ (0) $ 0 $ (0) $ (0)        
Shares used in the calculation of net loss per share:                
Basic 0 0 0 0        
Diluted 0 0 0 0        
As adjusted [Member]                
Stockholders' equity:                
Net Income (Loss) $ (4,589) $ (4,868) $ (10,717) $ (15,306)        
Other comprehensive loss items:                
Deemed dividend on convertible preferred stock (7,610) (9,377) (9,377) (16,987)        
Net loss attributable to common stockholders $ (12,199) $ (14,245) $ (20,094) $ (32,293)        
Net loss per share attributable to common stockholders:                
Basic $ (10.35) $ (26.14) $ (45.98) $ (47.01)        
Diluted $ (10.35) $ (26.14) $ (45.98) $ (47.01)        
Shares used in the calculation of net loss per share:                
Basic 1,179 545 437 687        
Diluted 1,179 545 437 687