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)

v3.21.4
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 ($)
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale Securities, Amortized Cost Basis $ 39,041,000 $ 18,387,000 $ 18,462,000
Debt Securities, Available-for-sale 39,043,000 18,393,000 18,461,000
Cash Equivalents, at Carrying Value 33,138,000 9,424,000 8,761,000
Short-term Investments 1,705,035 2,759,024 9,449,650
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 3,000 7,000  
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (1,000) (1,000) (1,000)
Long-term Investments 3,044,000 6,210,000 250,000
Cash and Cash Equivalents [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 33,138,000 9,424,000 8,761,000
Debt Securities, Available-for-sale 33,138,000 9,424,000 8,761,000
Cash Equivalents, at Carrying Value 33,138,000 9,424,000 8,761,000
Cash and Cash Equivalents [Member] | Money Market Funds [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 33,138,000 9,424,000 8,761,000
Debt Securities, Available-for-sale 33,138,000 9,424,000 8,761,000
Cash Equivalents, at Carrying Value 33,138,000 9,424,000 8,761,000
Investments [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 5,903,000 8,963,000 9,701,000
Debt Securities, Available-for-sale 5,905,000 8,969,000 9,700,000
Short-term Investments 2,861,000 2,759,000 9,450,000
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 3,000 7,000  
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (1,000) (1,000) (1,000)
Long-term Investments 3,044,000 6,210,000 250,000
Investments [Member] | Commercial Paper [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale Securities, Amortized Cost Basis   700,000 8,695,000
Debt Securities, Available-for-sale   700,000 8,694,000
Short-term Investments   700,000 8,694,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax     (1,000)
Investments [Member] | Corporate Notes/Bonds [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 5,653,000 7,658,000 756,000
Debt Securities, Available-for-sale 5,655,000 7,664,000 756,000
Short-term Investments 2,861,000 2,059,000 756,000
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 3,000 7,000  
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (1,000) (1,000)  
Long-term Investments 2,794,000 5,605,000  
Investments [Member] | Convertible Debt Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale Securities, Amortized Cost Basis 250,000 605,000 250,000
Debt Securities, Available-for-sale 250,000 605,000 250,000
Long-term Investments $ 250,000 $ 605,000 $ 250,000