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Short-term Investments and Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Summary of Investments
The following is a summary of available-for-sale securities as of September 30, 2022 and December 31, 2021:
 As of September 30, 2022
 Contractual
Maturity (in years)
CostGross Unrealized
Gains
Gross Unrealized
Losses
Fair Market Value
Mutual funds---$148,919,794 $— $(12,168,368)$136,751,426 
U.S. treasury securities
Less than 1
119,296,713 512 (229,625)119,067,600 
Certificates of deposit
Less than 1
2,977,223 14,156 (325)2,991,054 
U.S. agency mortgage-backed securities*1,451,344 — (366,526)1,084,818 
$272,645,074 $14,668 $(12,764,844)$259,894,898 
 As of December 31, 2021
Contractual
Maturity (in years)
CostGross Unrealized
Gains
Gross Unrealized
Losses
Fair Market Value
Mutual funds---$192,966,772 $87,069 $(1,614,411)$191,439,430 
U.S. treasury securities
Less than 1
94,193,441 — (9,921)94,183,520 
Commercial paper
Less than 1
39,967,853 — — 39,967,853 
Certificates of deposit
Less than 1
2,976,210 15,618 (338)2,991,490 
U.S. agency mortgage-backed securities*1,608,137 4,508 (23,998)1,588,647 
$331,712,413 $107,195 $(1,648,668)$330,170,940 
*No single maturity date.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis The following table presents the Company’s assets that were measured at fair value on a recurring basis, determined using the following inputs as of September 30, 2022:
Fair Value Measurements at
 September 30, 2022
 TotalQuoted Prices
in Active Markets
(Level 1)
Significant
Other Unobservable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Short-term investments
     Mutual funds$136,751,426 $136,751,426 $— $— 
     U.S. treasury securities119,067,600 119,067,600 — — 
     Certificates of deposit2,991,054 — 2,991,054 — 
     U.S. agency mortgage-backed securities1,084,818 — 1,084,818 — 
Total short-term investments259,894,898 255,819,026 4,075,872 — 
Investment in affiliated entity2,129,992 2,129,992 — — 
Total assets measured at fair value$262,024,890 $257,949,018 $4,075,872 $— 

The following table presents the Company’s assets that were measured at fair value on a recurring basis, determined using the following inputs as of December 31, 2021:
Fair Value Measurements at
 December 31, 2021
 TotalQuoted Prices
in Active Markets
(Level 1)
Significant
Other Unobservable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Short-term investments
     Mutual funds$191,439,430 $191,439,430 $— $— 
     U.S. treasury securities94,183,520 94,183,520 — — 
     Commercial paper39,967,853 — 39,967,853 — 
     Certificates of deposit2,991,490 — 2,991,490 — 
     U.S. agency mortgage-backed securities1,588,647 — 1,588,647 — 
Total short-term investments330,170,940 285,622,950 44,547,990 — 
Investment in affiliated entity3,906,796 3,906,796 — — 
Total assets measured at fair value$334,077,736 $289,529,746 $44,547,990 $—