Fair Value Measurements (Details 4) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gain on Sale of Investments	$ 2,490	$ 49,341	$ 10,609
Proceeds from Issuance of Warrants	(2,675)	(50,092)	(9,828)
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants	696	432	424
Equity Warrants Transfers to Available For Sale Securities	$ (18)	(646)	119
Warrants Not Settleable in Cash, Fair Value Disclosure		$ 3,555	$ 4,520	$ 3,434