Annual report pursuant to Section 13 and 15(d)

Revenue Disaggregation (Details - Geographic regions)

v3.23.2
Revenue Disaggregation (Details - Geographic regions) - USD ($)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Disaggregation of Revenue [Line Items]    
Revenues $ 13,272,000 $ 12,628,000
Product [Member]    
Disaggregation of Revenue [Line Items]    
Revenues 11,926,000 12,179,000
Product [Member] | Revenue, Segment Benchmark [Member] | UNITED STATES    
Disaggregation of Revenue [Line Items]    
Revenues 3,428,000 3,807,000
Product [Member] | Revenue, Segment Benchmark [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Revenues 4,051,000 3,410,000
Product [Member] | Revenue, Segment Benchmark [Member] | Asia [Member]    
Disaggregation of Revenue [Line Items]    
Revenues 2,451,000 2,350,000
Product [Member] | Revenue, Segment Benchmark [Member] | Latin America [Member]    
Disaggregation of Revenue [Line Items]    
Revenues 2,383,000 2,095,000
Product [Member] | Revenue, Segment Benchmark [Member] | Rest Of The World [Member]    
Disaggregation of Revenue [Line Items]    
Revenues $ 959,000 $ 966,000