XML 36 R25.htm IDEA: XBRL DOCUMENT v3.20.4
Zimmer Development Agreement (Tables)
3 Months Ended
Dec. 31, 2020
Zimmer Development Agreement [Abstract]  
Schedule of deferred revenue

   2020 
Deferred Revenue    
Balance as of beginning of period – September 30, 2020  $73,434 
Revenue recognized   (22,274)
Balance as of end of period – December 31, 2020  $51,160