XML 69 R59.htm IDEA: XBRL DOCUMENT v3.21.1
Commitments and Contingencies - Litigation Narrative (Details)
Feb. 04, 2019
Nov. 11, 2019
Aug. 12, 2019
Loss Contingencies [Line Items]      
Threshold period for not filing response to complaint 30 days    
Jackson Vs Zaderej      
Loss Contingencies [Line Items]      
Minimum number of candidate elected to board     6
Novitzki Vs Zaderej      
Loss Contingencies [Line Items]      
Minimum number of candidate elected to board   3