Quarterly report pursuant to Section 13 or 15(d)

MARKETABLE SECURITIES (Details)

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MARKETABLE SECURITIES (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Fair Value [Member]    
Certificates of deposit $ 9,572,000 $ 8,959,000
Fixed income mutual funds 8,628,000 7,879,000
Corporate bonds and notes 5,563,000 8,892,000
Total marketable securities 23,763,000 25,730,000
Cost Basis [Member]    
Certificates of deposit 9,516,000 8,953,000
Fixed income mutual funds 8,692,000 7,878,000
Corporate bonds and notes 5,492,000 8,813,000
Total marketable securities 23,700,000 25,644,000
Gross Unrealized Gains [Member]    
Certificates of deposit 56,000 6,000
Fixed income mutual funds 0 1,000
Corporate bonds and notes 88,000 112,000
Total marketable securities 144,000 119,000
Gross Unrealized Losses [Member]    
Certificates of deposit 0 0
Fixed income mutual funds (64,000) 0
Corporate bonds and notes (17,000) (33,000)
Total marketable securities $ (81,000) $ (33,000)