5. Investments (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Investments [Abstract]

Schedule of gains in invesments

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2019			2018		2019			2018
	(In thousands)
Change in fair value of investment, warrants	$	3,091		$	2,865	$	2,394		$	(4,782	)
Change in fair value of investment, common stock		3,889			8,482		11,494			(24,968	)
Loss on sale of investment, common stock		(1,642	)		–		(7,232	)		–
Net realized and unrealized gain (loss) on investment at fair value	$	5,338		$	11,347	$	6,656		$	(29,750	)