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Business Description, Basis of Presentation and Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jan. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Oct. 31, 2022
Business Description, Basis of Presentation and Significant Accounting Policies        
Current inventory   $ 8,961 $ 10,033  
Long-term inventory   2,707 3,567  
Operating lease right-of-use assets   1,047 1,537  
Operating lease liability, net of current   492 1,026  
Decreased revenue due to the impact of the adoption of the New Revenue Standard   25,205 28,967  
Advertising expenses   572 508  
Net deferred tax assets   0    
Cash and cash equivalents   984 1,071  
Working capital   69,307 17,969  
Net cash used in operating activities   4,179 4,394  
Decrease of cash used in operating activities   (215)    
Time Deposits, at or Above FDIC Insurance Limit   $ 564    
Period of cumulative pre-tax operating losses   3 years    
Short-Term Notes Payable        
Business Description, Basis of Presentation and Significant Accounting Policies        
Principal amount of loan obtained       $ 2,000
Litigation for Intellectual Property Infringement        
Business Description, Basis of Presentation and Significant Accounting Policies        
Litigation Settlement, Expense   $ 27,374    
Equipment Sales        
Business Description, Basis of Presentation and Significant Accounting Policies        
Decreased revenue due to the impact of the adoption of the New Revenue Standard   25,104    
Software and Licenses        
Business Description, Basis of Presentation and Significant Accounting Policies        
Decreased revenue due to the impact of the adoption of the New Revenue Standard   $ 101    
Common Stock        
Business Description, Basis of Presentation and Significant Accounting Policies        
Number of common stock issued for cancellation and termination of short-term notes $ 2,000      
Minimum        
Business Description, Basis of Presentation and Significant Accounting Policies        
Property and equipment, useful life (in years)   2 years    
Intangible assets, estimated useful lives   3 years    
Maximum        
Business Description, Basis of Presentation and Significant Accounting Policies        
Property and equipment, useful life (in years)   10 years    
Intangible assets, estimated useful lives   10 years    
Maturity period of highly-liquid investments classified as cash equivalents   3 months    
Period of payment requirement from date of invoicing for distributor payment   45 days    
Period of scheduled delivery date to customer   1 year    
Period of payment requirement from date of invoicing for dealer payment   30 days    
Replacement Parts        
Business Description, Basis of Presentation and Significant Accounting Policies        
Current inventory   $ 193 $ 130