Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details Textual)

v3.21.1
Income Taxes (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Income Taxes (Textual)    
Change in deferred tax assets valuation allowance $ 1,333,000  
Japan [Member]    
Income Taxes (Textual)    
Net operating loss $ 369,000 $ 392,000
Expiring date, description expiring in 2031 expiring in 2031
Taiwan [Member]    
Income Taxes (Textual)    
Net operating loss $ 1,433,000 $ 2,405,000
Expiring date, description expiring in 2031 expiring in 2031
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 $ 17,107,000 $ 16,743,000
Expiring date, description carried forward indefinitely carried forward indefinitely
State [Member]    
Income Taxes (Textual)    
Net operating loss $ 26,363,000 $ 27,461,000
Expiring date, description expiring in 2041 expiring in 2041
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
Expiring date, description The credit can be carried forward indefinitely. The credit can be carried forward indefinitely.