Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details Textual)

v3.10.0.1
Income Taxes (Details Textual) - USD ($)
6 Months Ended
Sep. 30, 2018
Mar. 31, 2018
Income Taxes (Textual)    
Change in deferred tax assets valuation allowance $ 2,773,000  
Federal research and development tax credit [Member]    
Income Taxes (Textual)    
Research and development tax credit $ 37,000 $ 37,000
Expiring date, description The credit begins to expire in 2034 if not utilized.  
California state research and development tax credit [Member]    
Income Taxes (Textual)    
Research and development tax credit $ 39,000 39,000
State [Member]    
Income Taxes (Textual)    
Net operating loss $ 20,102,000 8,985,000
Expiring date, description Expiring in 2038.  
Federal [Member]    
Income Taxes (Textual)    
Net operating loss $ 18,265,000 7,643,000
Expiring date, description Expiring in 2038 and 2037.  
Japan [Member]    
Income Taxes (Textual)    
Net operating loss $ 307,000 339,000
Expiring date, description expiring in 2028  
Taiwan [Member]    
Income Taxes (Textual)    
Net operating loss $ 238,000 $ 0
Expiring date, description expiring in 2028