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Note 2 - Supplemental Balance-sheet Information (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Financing Receivable, Past Due [Table Text Block]
  

December 31, 2021

  

December 31, 2020

 

Contract and other receivables

 $1,853  $922 

Allowance for doubtful accounts

  (7)  (7

)

  $1,846  $915 
Schedule of Inventory, Current [Table Text Block]
  

December 31, 2021

  

December 31, 2020

 

Materials and component parts

 $150  $149 

Reseller inventories

  701   52 

Reserve

  (4

)

  (4

)

Inventories, net

 $847  $197 
Schedule of Intangible Assets and Goodwill [Table Text Block]
  

December 31, 2021

  

December 31, 2020

 
  

Gross

      

Gross

     
  

Carrying

  

Accumulated

  

Carrying

  

Accumulated

 
  

Amount

  

Amortization

  

Amount

  

Amortization

 

Intangible assets not subject to amortization:

                

Goodwill

 $780   -  $780   - 

Intangible assets subject to amortization:

                

Customer relationships

 $906  $(780) $906  $(690)

Acquired software

 $234  $(234) $234  $(234)
Schedule of Goodwill [Table Text Block]
  

December 31,

2021

  

December 31, 2020

 

Facilities unit

 $643  $643 

Systems Integration unit

  137   137 

Total

 $780  $780 
Property, Plant and Equipment [Table Text Block]
 

Estimated Useful

 

December 31,

 
 

Lives

 

2021

  

2020

 
 (years)        
            

Trade equipment

 

5  $144  $144 

Leasehold improvements

2

5  725   725 

Furniture and fixtures

 

7   16   16 

Computer equipment and software

 

3   2,135   2,071 
      3,020   2,956 

Less accumulated depreciation

     (2,739

)

  (2,294

)

Property and equipment, net

    $281  $662 
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
  

December 31,

 
  

2021

  

2020

 

Accounts payable

 $5,472  $12,550 

Legal settlement

  500   - 

Accrued expenses

  703   453 

Compensation, benefits and related taxes

  270   358 

Other accrued expenses

  71   13 

Total accounts payable and accrued expenses

 $7,016  $13,374