Commitments and Contingencies (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Commitments and Contingencies (Details) [Line Items]
Operating Leases, Rent Expense	$ 146,000	$ 161,000
Office Space In San Francisco California [Member] | The first lease [Member]
Commitments and Contingencies (Details) [Line Items]
Lease Expiration Date	Jul. 31, 2017
Office Space In San Francisco California [Member] | The second lease [Member]
Commitments and Contingencies (Details) [Line Items]
Lease Expiration Month and Year	April 2020
Office Space In San Francisco California [Member] | The third lease [Member]
Commitments and Contingencies (Details) [Line Items]
Lease Expiration Date	Dec. 31, 2018