Investments

12 Months Ended

Dec. 31, 2020

Investments

Investments

Note 4.  Investments

The Company’s available-for-sale investments at fair value consisted of the following at December 31, 2020 and 2019:

	December 31, 2020
			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
(In thousands)	Cost		(Losses)		Gains		Value
Short-term investments – commercial paper	$	3,499	$	—	$	—	$	3,499
Short-term investments – US treasury bills		1,000		—		—		1,000
Total short-term investments	$	4,499	$	—	$	—	$	4,499

	December 31, 2019
			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
(In thousands)	Cost		(Losses)		Gains		Value
Short-term investments – commercial paper	$	2,774	$	—	$	—	$	2,774
Total short-term investments	$	2,774	$	—	$	—	$	2,774

The Company had no realized gains or losses from the sale of investments in available-for-sale securities during each of the years ended December 31, 2020 and 2019. In accordance with ASU 2016-13, if the fair value of the Company’s investments in available-for-sale debt securities is less than the amortized cost, the Company records (i) an allowance for credit losses with a corresponding charge to net income (loss) for any credit-related impairment, with subsequent improvements in expected credit losses recognized as a reversal of the allowance, and/or (ii) any non-credit impairment loss to other comprehensive income (loss).

As of December 31, 2020 and 2019, the Company had no allowance for credit losses pertaining to the Company’s investments in available-for-sale debt securities. Additionally, there were no impairment charges or recoveries recorded during each of the years ended December 31, 2020 and 2019.