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Commitments and Contingencies (Details) - USD ($)
$ in Millions
1 Months Ended
Jun. 13, 2019
May 04, 2019
Feb. 02, 2019
Annual Bonuses and Equity Incentive Awards [Abstract]      
Annual bonus related expenses included in accrued payroll expenses   $ 1.5 $ 3.9
Subsequent Event [Member] | Jeffry Rosenthal [Member]      
Annual Bonuses and Equity Incentive Awards [Abstract]      
Salary continuation payable $ 0.6    
Maximum term of salary continuation 1 year    
Subsequent Event [Member] | Jeffry Rosenthal [Member] | Maximum [Member]      
Annual Bonuses and Equity Incentive Awards [Abstract]      
Cash lump sum payment $ 1.0