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Commitments and Contingencies (Details) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 28, 2018 USD ($) item	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2015
Leased assets
Term of lease				5 years
Option to extend the term	true
Number of renewal option | item	1
Renewal term	5 years
Lease Cost:
Operating lease cost		$ 343	$ 686
Variable lease cost		179	358
Total lease cost		$ 522	1,044
Operating cash flows used for operating leases			$ 572
Weighted average remaining lease term		4 years 2 months 1 day	4 years 2 months 1 day
Weighted average discount rate		6.47%	6.47%
Minimum
Leased assets
Rent for facility lease	$ 1,400
Maximum
Leased assets
Rent for facility lease	$ 1,700

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