4. Property and Equipment, net |
6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Property, Plant and Equipment [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Property and Equipment, net |
Property and equipment, net consists of the following:
Depreciation expense was approximately $6,000 and $9,000 for the three months ended June 30, 2017 and 2016, respectively, and approximately $14,000 and $18,000 for the six months ended June 30, 2017 and 2016, respectively. |