Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Federal Net Operating Losses and Tax Credits Carryforwards (Details)

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Income Taxes - Summary of Federal Net Operating Losses and Tax Credits Carryforwards (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
Operating Loss Carryforwards [Line Items]  
Net operating losses, Expiration period State net operating loss carryforwards may be further limited, including in Pennsylvania, which has a limitation of 30%, 35% or 40% of taxable income after modifications and apportionment on state net operating losses utilized in any one year during tax years beginning during 2017, 2018 or 2019 going forward, respectively.
Federal [Member] | 2019  
Operating Loss Carryforwards [Line Items]  
Net operating losses $ 1,357
Net operating losses, Expiration period No expiration
State  
Operating Loss Carryforwards [Line Items]  
Net operating losses $ 1,357
Net operating losses, Expiration period start 2028
Net operating losses, Expiration period end 2038
Foreign  
Operating Loss Carryforwards [Line Items]  
Net operating losses $ 672
Net operating losses, Expiration period No expiration