Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plan (Details)

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Employee Benefit Plan (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Defined Contribution Plan Disclosure [Line Items]          
Company's matching contribution percent       25.00% 25.00%
Percent of participant's compensation       6.00% 6.00%
Vesting percentage for employees hired prior to July 2017       100.00%  
Vesting period for employees hired after July 2017       3 years  
401(k) Plan matching contributions expense   $ 179 $ 639   $ 642
Subsequent Event          
Defined Contribution Plan Disclosure [Line Items]          
Company's matching contribution percent 100.00%        
Percent of participant's compensation 5.00%