Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2022
Accounting Policies [Line Items]
Impairment charges on investments	$ 0	$ 0
Impairment of Long-Lived Assets	0	$ 0
Right-of-use assets	1,292
Operating Lease, Liability	$ 1,463
Accounting Standards Update 2016-02 [Member]
Accounting Policies [Line Items]
Right-of-use assets			$ 1,500
Operating Lease, Liability			$ 1,700
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2022
Accounting Standards Update 2019-12 [Member]
Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 01, 2022
Change in accounting principle, accounting standards update, immaterial effect	true