Cash Equivalents and Short-Term Investments (Details Narrative) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash and Cash Equivalents [Abstract]
Debt securities, held-to-maturity, description	Maturities of less than one year.	Maturities of less than one year.
Realized gains on available-for-sale securities	$ 100