Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies (Details Narrative)

v3.20.2
Organization and Summary of Significant Accounting Policies (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Mar. 31, 2020
Long-lived assets impairment losses  
Shipping and handling costs 29,000 28,000 55,000 59,000  
Estimated returns net of allowances 1,000 19,000 1,000 19,000  
Revenue 837,714 1,201,127 1,741,781 2,711,962  
Collaborative Research Revenue [Member]          
Revenue 40,000 40,000  
Warrant [Member]          
Accrued warranty liabilities 29,000   29,000   $ 35,000
Warranty costs 28,000 27,000 $ 55,000 $ 59,000  
Patents and Licenses [Member]          
Estimated useful lives     5 years 17 years  
Patents [Member]          
Cost of patents 769,000   $ 769,000   715,000
Accumulated amortization 300,000   300,000   293,000
Amortization of patents 3,000 3,000 7,000 $ 6,000  
Patents [Member] | March 2021 [Member]          
Amortization of patents     7,000    
Patents [Member] | March 2022 [Member]          
Amortization of patents     14,000    
Patents [Member] | March 2023 [Member]          
Amortization of patents     13,000    
Patents [Member] | March 2024 [Member]          
Amortization of patents     13,000    
Patents [Member] | March 2025 [Member]          
Amortization of patents     9,000    
Patents [Member] | Thereafter [Member]          
Amortization of patents     412,000    
License [Member]          
Cost of patents 939,000   939,000   544,000
Accumulated amortization 398,000   398,000   $ 395,000
Amortization of patents 2,000 2,000 3,000 3,000  
License [Member] | March 2021 [Member]          
Amortization of patents     4,000    
License [Member] | March 2022 [Member]          
Amortization of patents     7,000    
License [Member] | March 2023 [Member]          
Amortization of patents     7,000    
License [Member] | March 2024 [Member]          
Amortization of patents     3,000    
License [Member] | March 2025 [Member]          
Amortization of patents     0    
License [Member] | Thereafter [Member]          
Amortization of patents     520,000    
General and Administrative Expense [Member]          
Shipping and handling costs $ 2,000 $ 1,000 $ 7,000 $ 2,000