| Summary of Net Revenue, Cost of Sales, Depreciation and Amortization, Operating Profit, and Interest Expense and Assets by Segment | 
 The following table shows, by segment: net revenue, cost of sales, depreciation and amortization, operating profit, and interest expense for the three and nine months ended August 31, 2022 and 2021: 
      
       
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
        
       
           | 
           | 
        For the three months ended August 31,  | 
           | 
        
       
           | 
           | 
        2022  | 
           | 
           | 
        2021  | 
           | 
        
       
        Net revenue:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        7,522,134  | 
           | 
           | 
        $  | 
        7,326,516  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        21,000  | 
           | 
           | 
           | 
        18,200  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        137,825  | 
           | 
           | 
           | 
        158,936  | 
           | 
        
       
        Total net revenue  | 
           | 
        $  | 
        7,680,959  | 
           | 
           | 
        $  | 
        7,503,652  | 
           | 
        
       
        Cost of sales:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        1,883,400  | 
           | 
           | 
        $  | 
        1,943,419  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        10,622  | 
           | 
           | 
           | 
        53,498  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        454,733  | 
           | 
           | 
           | 
        462,021  | 
           | 
        
       
        Total cost of sales  | 
           | 
        $  | 
        2,348,755  | 
           | 
           | 
        $  | 
        2,458,938  | 
           | 
        
       
        Operating profit:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        1,268,146  | 
           | 
           | 
        $  | 
        1,941,976  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        3,433  | 
           | 
           | 
           | 
        (42,193  | 
        )  | 
        
       
        Public cord blood banking  | 
           | 
           | 
        (317,268  | 
        )  | 
           | 
           | 
        (303,445  | 
        )  | 
        
       
        Total operating profit  | 
           | 
        $  | 
        954,311  | 
           | 
           | 
        $  | 
        1,596,338  | 
           | 
        
       
        Depreciation and amortization:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        274,598  | 
           | 
           | 
        $  | 
        262,229  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        6,945  | 
           | 
           | 
           | 
        6,894  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        360  | 
           | 
           | 
           | 
        359  | 
           | 
        
       
        Total depreciation and amortization  | 
           | 
        $  | 
        281,903  | 
           | 
           | 
        $  | 
        269,482  | 
           | 
        
       
        Interest expense:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        365,349  | 
           | 
           | 
        $  | 
        335,870  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        —  | 
           | 
           | 
           | 
        —  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        —  | 
           | 
           | 
           | 
        —  | 
           | 
        
       
        Total interest expense  | 
           | 
        $  | 
        365,349  | 
           | 
           | 
        $  | 
        335,870  | 
           | 
        
       
           | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
           | 
           | 
        For the nine months ended August 31,  | 
           | 
        
       
           | 
           | 
        2022  | 
           | 
           | 
        2021  | 
           | 
        
       
        Net revenue:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        22,159,702  | 
           | 
           | 
        $  | 
        21,224,033  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        75,600  | 
           | 
           | 
           | 
        56,200  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        337,405  | 
           | 
           | 
           | 
        289,231  | 
           | 
        
       
        Total net revenue  | 
           | 
        $  | 
        22,572,707  | 
           | 
           | 
        $  | 
        21,569,464  | 
           | 
        
       
        Cost of sales:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        5,343,455  | 
           | 
           | 
        $  | 
        5,453,203  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        63,934  | 
           | 
           | 
           | 
        129,581  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        1,246,108  | 
           | 
           | 
           | 
        1,111,022  | 
           | 
        
       
        Total cost of sales  | 
           | 
        $  | 
        6,653,497  | 
           | 
           | 
        $  | 
        6,693,806  | 
           | 
        
       
        Operating profit:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        4,538,058  | 
           | 
           | 
        $  | 
        5,743,184  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        (9,168  | 
        )  | 
           | 
           | 
        (94,065  | 
        )  | 
        
       
        Public cord blood banking  | 
           | 
           | 
        (909,783  | 
        )  | 
           | 
           | 
        (822,452  | 
        )  | 
        
       
        Total operating profit  | 
           | 
        $  | 
        3,619,107  | 
           | 
           | 
        $  | 
        4,826,667  | 
           | 
        
       
        Depreciation and amortization:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        818,081  | 
           | 
           | 
        $  | 
        536,823  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        20,834  | 
           | 
           | 
           | 
        20,683  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        1,080  | 
           | 
           | 
           | 
        661  | 
           | 
        
       
        Total depreciation and amortization  | 
           | 
        $  | 
        839,995  | 
           | 
           | 
        $  | 
        558,167  | 
           | 
        
       
        Interest expense:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell service  | 
           | 
        $  | 
        947,968  | 
           | 
           | 
        $  | 
        957,479  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        —  | 
           | 
           | 
           | 
        —  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        —  | 
           | 
           | 
           | 
        —  | 
           | 
        
       
        Total interest expense  | 
           | 
        $  | 
        947,968  | 
           | 
           | 
        $  | 
        957,479  | 
           | 
        
       
  
  
The following table shows the assets by segment as of August 31, 2022 and November 30, 2021: 
  
      
       
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
         | 
        
       
            | 
           | 
        As of  | 
           | 
           | 
        As of  | 
           | 
        
       
           | 
           | 
        August 31, 2022  | 
           | 
           | 
        November 30, 2021  | 
           | 
        
       
        Assets:  | 
           | 
           | 
           | 
           | 
           | 
           | 
        
       
        Umbilical cord blood and cord tissue stem cell    service  | 
           | 
        $  | 
        56,548,260  | 
           | 
           | 
        $  | 
        50,170,887  | 
           | 
        
       
        PrepaCyte CB  | 
           | 
           | 
        238,636  | 
           | 
           | 
           | 
        250,591  | 
           | 
        
       
        Public cord blood banking  | 
           | 
           | 
        9,978,397  | 
           | 
           | 
           | 
        10,240,598  | 
           | 
        
       
        Total assets  | 
           | 
        $  | 
        66,765,293  | 
           | 
           | 
        $  | 
        60,662,076  | 
           | 
        
       
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