XML 19 R10.htm IDEA: XBRL DOCUMENT

Short-term investments

3 Months Ended

Mar. 31, 2022

Short-Term Investments Disclosure [Abstract]

3. Short-term investments

The following is summary of short-term investments that the Company measures at fair value:

	Fair Value at March 31, 2022
	Level 1		Level 2		Level 3		Total

U.S. Treasury obligations		398,039		-		-		398,039
U.S. government agencies		-		1,207,746		-		1,207,746
Corporate and foreign bonds		-		6,842,936		-		6,842,936
Money market funds⁽¹⁾		1,334,906		-		-		1,334,906
Total short-term investments	$	1,732,945	$	8,050,682	$	-	$	9,783,627

⁽¹⁾	Money market funds are included in cash and cash equivalents in the balance sheet.

	Fair Value at December 31, 2021
	Level 1		Level 2		Level 3		Total

U.S. Treasury obligations		401,290		-		-		401,290
U.S. government agencies		-		1,424,477		-		1,424,477
Corporate and foreign bonds		-		7,507,705		-		7,507,705
Money market funds²		576,742		-		-		576,742
Total short-term investments	$	978,032	$	8,932,182	$	-	$	9,910,214

⁽²⁾	Money market funds are included in cash and cash equivalents in the balance sheet.

As of March 31, 2022 and December 31, 2021, the Company reported accrued interest receivable related to short-term investments of $57,064 and $52,484, respectively. These amounts are recorded in other assets on the Balance Sheets and are not included in the carrying value of the short-term investments.