Fair Value Measurements (Fair Value, Warrants Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Fair value of warrants at beginning of year	$ 143	$ 138	$ 142
Unrealized loss on fair valuation of warrants	1	(2)	2
Fair value of warrants at end of year	$ 144	136	$ 144
Fair Value, Inputs, Level 3 [Member]
Fair value of warrants at beginning of year		138
Fair value of warrants at end of year		$ 136

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Name:	us-gaap_UnrealizedGainLossOnDerivatives
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration