XML 51 R40.htm IDEA: XBRL DOCUMENT v3.21.2
Stockholders' Equity - Restricted Stock Units (Details) - Restricted Stock Units - USD ($)
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Total Restricted Stock Units      
Non-vested at beginning of period (in shares) 491    
Vested (in shares) (491)    
Non-vested at end of period (in shares) 0    
Weighted-Average Grant Date Fair Value Per Share      
Nonvested, weighted average grant date fair value at end of period (in USD per share) $ 147.60    
Vested, weighted average grant date fair value (in USD per share) 147.60    
Nonvested, weighted average grant date fair value at end of period (in USD per share) $ 0    
Equity instruments other than options, aggregate intrinsic value, nonvested $ 0   $ 8,833
Equity instruments other than options, vested in period, fair value $ 100,000 $ 100,000