Selected Balance Sheet Detail - Schedule of Lease Costs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lease expense:
Operating lease expense	$ 123
Total lease expense	123
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 117
For operating lease:
Weighted average remaining lease term (in years)	7 years 10 months 24 days
Weighted average discount rate	10.00%