Commitments and Contingencies (Details) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Feb. 28, 2018 USD ($) item	Sep. 30, 2019 USD ($)	Sep. 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		$ 344	$ 1,031
Variable lease cost		149	506
Total lease cost		$ 493	1,537
Operating cash flows used for operating leases			$ 914
Weighted average remaining lease term		4 years	4 years
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