v3.20.1
Income Taxes - Additional Information (Detail)
12 Months Ended
Dec. 31, 2019
USD ($)
Income Tax Contingency [Line Items]  
Federal statutory income tax rate 21.00%
Federal income tax net operating loss carryforwards $ 27,500,000
Federal operating loss carryforwards expiration year 2027
State net operating loss carryforwards $ 32,800,000
State operating loss carryforwards expiration year 2027
Percentage of change in ownership 50.00%
Net operating loss carryforwards limitation on use ownership change period 3 years
Federal and state net operating loss carryforwards limitations on use $ 18,900,000
Cumulative effect on retained earnings 0
Unrecognized tax benefits 0
Continuing Operations [Member]  
Income Tax Contingency [Line Items]  
Federal income tax net operating loss carryforwards 19,000,000
Discontinued Operations [Member]  
Income Tax Contingency [Line Items]  
Federal income tax net operating loss carryforwards $ 8,500,000
Earliest Tax Year [Member]  
Income Tax Contingency [Line Items]  
Open tax year 2016
Latest Tax Year [Member]  
Income Tax Contingency [Line Items]  
Open tax year 2019
Tax Year After 2017 [Member]  
Income Tax Contingency [Line Items]  
Federal income tax net operating loss carryforwards, indefinitely carried forward $ 24,900,000
Tax Year Prior to 2018 [Member]  
Income Tax Contingency [Line Items]  
Federal income tax net operating loss carryforwards, subject to expiration $ 2,600,000