Property, Plant and Equipment, net (Narrative) (Details) - USD ($) |
12 Months Ended | |
---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
Property Plant And Equipment [Line Items] | ||
Depreciation expense | $ 102,000 | $ 94,000 |
Building | ||
Property Plant And Equipment [Line Items] | ||
Estimated service life | 25 years | |
Furniture, fixtures and office equipment [Member] | ||
Property Plant And Equipment [Line Items] | ||
Estimated service life | 5 years | |
Software and technology assets [Member] | ||
Property Plant And Equipment [Line Items] | ||
Estimated service life | 3 years |