Financial Derivatives Schedule of Warrant Contracts (Details) - USD ($) shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Financial derivatives–assets, at fair value-	$ 15,976	$ 15,479
Warrants
Derivative [Line Items]
Number of Shares Underlying Warrant Contracts	2,120	1,897
Financial derivatives–assets, at fair value-	$ 938	$ 36
Remaining Years to Maturity	1 year 9 months 14 days	2 years 4 months 24 days