Investment in Investee Carrying value, estimated fair value and approximate equity percentage (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of Equity Method Investments [Line Items]

Equity Method Investments [Table Text Block]

The carrying value, estimated fair value and approximate equity percentage for the Company's investment in investee at December 31, 2018 and December 31, 2017 were as follows:

(in thousands, except for percentages)
	December 31, 2018						December 31, 2017
	Equity Percentage		Estimated Fair Value		Carrying Value		Equity Percentage		Estimated Fair Value		Carrying Value
ICL	22.9	%	$	951	$	951	31.2	%	$	3,816	$	5,230