Financial Instruments, Fair Value, and Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2020

Summary of Fair Value Measurements and Financial Statement Presentation

The fair values of our assets, liabilities, and derivative positions recorded at fair value and their respective levels in the fair value hierarchy as of December 31, 2020 and December 31, 2019, were as follows:

	December 31, 2020								December 31, 2020
	Fair Values of Assets								Fair Values of Liabilities
In Thousands	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Other items reported at fair value:
Short-term investments	$	11,698	$	—	$	—	$	11,698	$	—	$	—	$	—	$	—
Commodity derivative contracts		467		—		—		467		—		—		—		—
Total	$	12,165	$	—	$	—	$	12,165	$	—	$	—	$	—	$	—

	December 31, 2019								December 31, 2019
	Fair Values of Assets								Fair Values of Liabilities
In Thousands	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Other items reported at fair value:
Commodity derivative contracts	$	62	$	—	$	—	$	62	$	—	$	—	$	—	$	—
Total	$	62	$	—	$	—	$	62	$	—	$	—	$	—	$	—

Composition of Short-term Investments

The composition of our short-term investments as of December 31, 2020, and December 31, 2019 were as follows:

	As of December 31,
In Thousands	2020		2019
Corporate debt securities	$	11,698	$	—

Summary of Certain Amounts Related to Hedging Activities

Certain amounts related to our hedging activities are as follows:

	Amount of Gain (Loss)				Amount of Gain (Loss) Reclassified to Earnings
	Recognized in AOCI				Year ended
	December 31,				December 31,
In thousands	2020		2019		2020		2019			2018
Cash flow hedges:
Commodity contracts	$	—	$	17	$	17	$	(81	)	$	—
Total	$	—	$	17	$	17	$	(81	)	$	—