Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Additional Information (Details)

v3.21.1
Balance Sheet Components - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Depreciation and amortization expense $ 19,000 $ 14,000  
Property and equipment, gross 1,047,000   $ 1,021,000
Accumulated Depreciation 898,000   $ 879,000
Capital lease      
Property and equipment, gross 72,000    
Accumulated Depreciation $ 14,000