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Commitments and Contingencies - Operating Lease Obligations (Details)
$ in Thousands
1 Months Ended
Apr. 30, 2018
ft²
Mar. 31, 2018
USD ($)
Subsequent Event [Line Items]    
2019   $ 96
2020   127
2021   131
2022   135
2023   139
Thereafter   192
Total   $ 820
Subsequent Event    
Subsequent Event [Line Items]    
Area of leased property | ft² 5,000  
Lease term, in months 76 months