5. Investments (Tables)

3 Months Ended

Mar. 31, 2020

Schedule of Investments [Abstract]

Schedule of gain (loss) on investments

	Three Months Ended
	March 31,
	2020			2019
	(In thousands)
Change in fair value of investment, warrants	$	630		$	(697	)
Change in fair value of investment, common stock		3,478			7,605
Loss on sale of investment, common stock		(3,316	)		(5,590	)
Net realized and unrealized gain (loss) on investment at fair value	$	792		$	1,318