Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details Textual)

v3.20.2
Income Taxes (Details Textual) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Income Taxes (Textual)    
Change in deferred tax assets valuation allowance $ 1,324,000  
Japan [Member]    
Income Taxes (Textual)    
Net operating loss $ 352,000 $ 350,000
Expiring date, description expiring through 2031. expiring through 2031.
Taiwan [Member]    
Income Taxes (Textual)    
Net operating loss $ 2,413,000 $ 1,898,000
Expiring date, description expiring in 2030 expiring in 2029
Federal [Member]    
Income Taxes (Textual)    
Net operating loss $ 8,243,000 $ 8,243,000
Expiring date, description expiring in 2037 expiring in 2037
Additional federal NOLs $ 13,535,000 $ 11,314,000
State [Member]    
Income Taxes (Textual)    
Net operating loss $ 23,509,000 $ 21,117,000
Expiring date, description expiring in 2040 expiring in 2039
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. 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