Investments (Tables)

12 Months Ended

Dec. 31, 2019

Cash And Cash Equivalents [Abstract]

Schedule of Cash Equivalents

Cash equivalents consisted of the following as of December 31, 2019 and 2018 (in thousands):

	December 31, 2019				December 31, 2018
	Cost		Estimated Fair Value		Cost		Estimated Fair Value
Institutional Money Market Funds	$	55,258	$	55,258	$	29,948	$	29,948