Annual report pursuant to Section 13 and 15(d)

MARKETABLE SECURITIES (Details)

v3.21.1
MARKETABLE SECURITIES (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Fair Value [Member]    
Certificates of deposit $ 3,541,000 $ 8,959,000
Fixed income mutual funds 11,335,000 7,879,000
Corporate bonds and notes 4,490,000 8,892,000
Total marketable securities 19,366,000 25,730,000
Cost Basis [Member]    
Certificates of deposit 3,534,000 8,953,000
Fixed income mutual funds 11,255,000 7,878,000
Corporate bonds and notes 4,500,000 8,813,000
Total marketable securities 19,289,000 25,644,000
Gross Unrealized Gains [Member]    
Certificates of deposit 7,000 6,000
Fixed income mutual funds 80,000 1,000
Corporate bonds and notes 18,000 112,000
Total marketable securities 105,000 119,000
Gross Unrealized Losses [Member]    
Certificates of deposit 0 0
Fixed income mutual funds 0 0
Corporate bonds and notes (28,000) (33,000)
Total marketable securities $ (28,000) $ (33,000)