Property, Plant and Equipment  | 
6 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2019  | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment | 
 Note 3 – Property, Plant and Equipment 
 The components of property and equipment are as follows (in thousands): 
 
 
 Depreciation expense incurred for the three months ended June 30, 2019 and 2018 was $101,000 and $95,000, respectively. Depreciation expense incurred for the six months ended June 30, 2019 and 2018 was $202,000 and $190,000, respectively.  | 
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