4. Property and Equipment |
6 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Property, Plant and Equipment [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Property and Equipment |
At June 30, 2019 and December 31, 2018, property and equipment consists of the following:
Depreciation expense for the six-month periods ended June 30, 2019 and 2018 was $3,000 and $17,000, respectively. Depreciation expense for the three-month periods ended June 30, 2019 and 2018 was $1,000 and $9,000, respectively. |