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Marketable Securities
 3 Months Ended
Mar. 31, 2022
Marketable Securities [Abstract]  
Marketable Securities 4. Marketable Securities

Marketable securities are classified as available-for-sale. The following tables summarize the amortized cost, gross unrealized gains and losses, and the fair value as of March 31, 2022 and December 31, 2021:

Amortized

Unrealized

Unrealized

Market

Cost

Gains

Losses

Value

December 31, 2021

Government bonds

$

28,453,161

$

82

$

(18,255)

$

28,434,988

Corporate bonds

29,874,696

-

(21,928)

29,852,768

Commercial paper

43,486,025

-

-

43,486,025

Marketable securities

$

101,813,882

$

82

$

(40,183)

$

101,773,781

March 31, 2022

Government bonds

$

37,488,888

$

33

$

(86,090)

$

37,402,831

Corporate bonds

26,549,151

15

(68,035)

26,481,132

Commercial paper

39,481,194

-

-

39,481,194

Marketable securities

$

103,519,232

$

48

$

(154,125)

$

103,365,156