Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies (Details)

v3.20.1
Organization and Summary of Significant Accounting Policies (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Total net sales $ 24,801,141 $ 24,046,354
DC power systems [Member]    
Total net sales 24,176,963 23,525,677
Engineering & Tech Support Services [Member]    
Total net sales 280,936 124,324
Accessories [Member]    
Total net sales 343,242 396,353
Telecom [Member]    
Total net sales 23,753,513 21,552,950
Government/Military [Member]    
Total net sales 589,490 1,477,121
Marine [Member]    
Total net sales 82,567 177,909
Other (backup DC power to various industries) [Member]    
Total net sales $ 375,571 $ 838,374