Registration of securities issued in business combination transactions

The following tables show the Company???s cash equivalents and available-for-sale securities??? amortized cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category (Details)

v3.21.2
The following tables show the Company’s cash equivalents and available-for-sale securities’ amortized cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category (Details) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost $ 18,166,000 $ 18,387,000 $ 18,462,000
Fair Value 18,166,000 18,393,000 18,461,000
Cash Equivalents 11,564,000 9,424,000 8,761,000
Gross Unrealized Gains 2,000 7,000  
Gross Unrealized Losses (2,000) (1,000) (1,000)
Short-term Investments 1,705,035 2,759,024 9,449,650
Long-term Investments 4,897,000 6,210,000 250,000
Cash and Cash Equivalents [Member]      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 11,564,000 9,424,000 8,761,000
Fair Value 11,564,000 9,424,000 8,761,000
Cash Equivalents 11,564,000 9,424,000 8,761,000
Cash and Cash Equivalents [Member] | Money Market Funds [Member]      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 11,564,000 9,424,000 8,761,000
Fair Value 11,564,000 9,424,000 8,761,000
Cash Equivalents 11,564,000 9,424,000 8,761,000
Investments [Member]      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 6,602,000 8,963,000 9,701,000
Fair Value 6,602,000 8,969,000 9,700,000
Gross Unrealized Gains 2,000 7,000  
Gross Unrealized Losses (2,000) (1,000) (1,000)
Short-term Investments 1,705,000 2,759,000 9,450,000
Long-term Investments 4,897,000 6,210,000 250,000
Investments [Member] | Corporate Notes/Bonds [Member]      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 6,228,000 7,658,000 756,000
Fair Value 6,228,000 7,664,000 756,000
Gross Unrealized Gains 2,000 7,000  
Gross Unrealized Losses (2,000) (1,000)  
Short-term Investments 1,705,000 2,059,000 756,000
Long-term Investments 4,523,000 5,605,000  
Investments [Member] | Convertible Debt Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 374,000 605,000 250,000
Fair Value 374,000 605,000 250,000
Long-term Investments $ 374,000 605,000 250,000
Investments [Member] | Commercial Paper [Member]      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost   700,000 8,695,000
Fair Value   700,000 8,694,000
Gross Unrealized Losses     (1,000)
Short-term Investments   $ 700,000 $ 8,694,000