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Zimmer Development Agreement (Tables)
6 Months Ended
Mar. 31, 2022
Zimmer Development Agreement [Abstract]  
Schedule of deferred revenue
   2022   2021 
Deferred Revenue        
Balance as of beginning of period – September 30  $8,622   $73,434 
Revenue recognized   (6,374)   (42,387)
Balance as of end of period – March 31  $2,248   $31,047