XML 124 R107.htm IDEA: XBRL DOCUMENT v3.20.4
Fair Value Measurements - Additional Information (Detail) - USD ($)
1 Months Ended
Nov. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2017
Debt Instrument [Line Items]        
Derivatives asset and liabilities outstanding   $ 0 $ 0  
Option on Securities [Member]        
Debt Instrument [Line Items]        
Derivative assets wrote off cost $ 2,169      
Punchbowl Inc [Member]        
Debt Instrument [Line Items]        
Equity method investment, ownership percentage       28.00%