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Leases - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Lessee, Lease, Description [Line Items]      
Lease expense included in selling, general and administrative expenses $ 0.4 $ 0.4  
Weighted average remaining lease term for operating leases 6 years 7 months 6 days    
Weighted average discount rate for operating lease (as percent) 6.30%    
Cash payments for operating lease expense $ 0.6   $ 0.6
Minimum      
Lessee, Lease, Description [Line Items]      
Remaining lease term 2 years    
Maximum      
Lessee, Lease, Description [Line Items]      
Remaining lease term 8 years