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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2021
Fair Value Disclosures [Abstract]  
Schedule of Financial Assets and Liabilities Measured at Fair Value on a 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, 2021:
 
Fair Value Measurements at
 September 30, 2021
 TotalQuoted Prices
in Active Markets
(Level 1)
Significant
Other Unobservable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Assets:
Short-term investments
     Mutual funds$202,490,059 $202,490,059 $— $— 
     U.S. treasury securities119,668,540 119,668,540 — — 
     Certificates of deposit2,991,637 — 2,991,637 — 
     U.S. agency mortgage-backed securities1,849,000 — 1,849,000 — 
Total short-term investments326,999,236 322,158,599 4,840,637 — 
Investment in affiliated entity3,886,710 3,886,710 — — 
Total assets measured at fair value$330,885,946 $326,045,309 $4,840,637 $— 

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, 2020:
 
Fair Value Measurements at
 December 31, 2020
 TotalQuoted Prices
in Active Markets
(Level 1)
Significant
Other Unobservable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Assets:
Cash and cash equivalents
     U.S. treasury securities$59,996,800 $59,996,800 $— $— 
Short-term investments
     Mutual funds154,873,174 154,873,174 — — 
     Certificates of deposit3,016,260 — 3,016,260 — 
     U.S. agency mortgage-backed securities3,025,501 — 3,025,501 — 
Total short-term investments160,914,935 154,873,174 6,041,761 — 
Investment in affiliated entity4,460,366 4,460,366 — — 
Total assets measured at fair value$225,372,101 $219,330,340 $6,041,761 $—