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Organization and Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of disaggregated net sales
   Three months ended
March 31,
 
  

2020

(Unaudited)

  

2019

(Unaudited)

 
DC power systems  $2,713   $7,605 
Accessories   147    142 
Total net sales  $2,860   $7,747 

 

   Three months ended
March 31,
 
  

2020

(Unaudited)

  

2019

(Unaudited)

 
Telecom  $2,717   $7,313 
Government/Military   4    372 
Marine   1    62 
Other (backup DC power to various industries)   138     
Total net sales  $2,860   $7,747 
Schedule of components of inventory

 

  

March 31,
2020 

(unaudited)

  

December 31,
2019 

 
         
Raw materials  $8,552   $8,651 
Finished goods   5,581    5,861 
    14,133    14,512 
Less: Inventory reserve   (600)   (600)
Total Inventories, net  $13,533   $13,912 

Schedule of reconciliation of the product warranty liability

 

Changes in estimates for warranties 

March 31,
2020

(unaudited)

  

December 31,
2019

 
Balance at beginning of the period  $375   $175 
Payments   (120)   (530)
Provision for warranties   120    730 
Balance at end of the period  $375   $375 

Schedule of potentially dilutive shares were excluded from the shares used to calculate diluted earnings per share as their inclusion would be anti-dilutive

 

  

March 31,

2020

(Unaudited)

  

March 31,

2019
(Unaudited)

 
Options  140,000   360,000 
Warrants   115,000    115,000 
Total   255,000    475,000