Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Contingency [Line Items]      
Total deferred tax assets $ 22,821 $ 16,367  
Federal net operating losses 14,885 9,962  
Valuation allowance $ 15,086 $ 4,701  
U.S. statutory rate 21.00% 21.00% 35.00%
Domestic Tax Authority      
Income Tax Contingency [Line Items]      
Operating loss carryforwards $ 70,900    
Operating loss carryforwards subject to expire $ 42,300    
Operating loss carryforwards, limitations on use, description remaining U.S. federal NOL carryforwards eligible to be carried forward indefinitely, subject to an 80% limitation on taxable income in each year.    
Operating loss carryforwards limitation rate on taxable income 80.00%    
State and Local Jurisdiction      
Income Tax Contingency [Line Items]      
Operating loss carryforwards $ 65,100