| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | 
 Changes in accumulated other comprehensive income (loss) attributable to Bio-Techne, net of tax, are summarized as follows (in thousands): 
 
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Unrealized  | 
  | 
  | 
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  | 
  | 
 
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Gains  | 
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Foreign   | 
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(Losses) on  | 
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Currency  | 
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Derivative  | 
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Translation   | 
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      | 
Instruments  | 
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Adjustments  | 
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Total  | 
 
Balance June 30, 2019  | 
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$  | 
 (9,537)  | 
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$  | 
 (73,983)  | 
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$  | 
 (83,521)  | 
 
Other comprehensive income (loss) before reclassifications  | 
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 (7,179)  | 
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   | 
 (9,963)  | 
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   | 
 (17,142)  | 
 
Reclassification from loss on derivatives to interest expense, net of taxes(1)  | 
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 3,464  | 
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 —  | 
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 3,464  | 
 
Balance June 30, 2020(3)  | 
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$  | 
 (13,253)  | 
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$  | 
 (83,946)  | 
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$  | 
 (97,199)  | 
 
Other comprehensive income (loss) before reclassifications, net of taxes, attributable to Bio-Techne(2)  | 
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   | 
 100  | 
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 32,848  | 
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 32,948  | 
 
Reclassification from loss on derivatives to interest expense, net of taxes, attributable to Bio-Techne(1)  | 
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 6,960  | 
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   | 
 —  | 
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 6,960  | 
 
Balance as of June 30, 2021(3)  | 
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$  | 
 (6,193)  | 
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$  | 
 (51,098)  | 
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$  | 
 (57,291)  | 
 
Other comprehensive income (loss) before reclassifications, net of taxes, attributable to Bio-Techne(2)  | 
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   | 
 9,403  | 
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   | 
 (32,171)  | 
  | 
   | 
 (22,768)  | 
 
Reclassification from loss on derivatives to interest expense, net of taxes, attributable to Bio-Techne(1)  | 
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   | 
 4,859  | 
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 4,859  | 
 
Balance as of June 30, 2022(3)  | 
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$  | 
 8,069  | 
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$  | 
 (83,269)  | 
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$  | 
 (75,200)  | 
 
 
| (1) | 
Gains (losses) on the interest swap will be reclassified into interest expense as payments on the derivative agreement are made. The Company reclassified $6,352 to interest expense and recorded a related tax benefit of $1,493 during fiscal 2022. The Company reclassified $8,598 to interest expense and $512 to non-operating income relating to variable interest payments that were probable not to occur for the fiscal year ended June 30, 2021. The Company also recorded a related tax benefit of $2,150 during fiscal 2021.  The Company reclassified $4,503 to interest expense and a related tax benefit tax of $1,040 during fiscal 2020.  
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| (2) | 
Other comprehensive income related to foreign currency translation adjustments in the table above includes the amount attributable to Bio-Techne and excludes the $70 and $103 attributable to the non-controlling interest in Eminence as of June 30, 2022, and June 30, 2021, respectively. 
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| (3) | 
The Company had a net deferred tax liability of $2,480 as of June 30, 2022, and net deferred tax benefits of $1,908 and $4,058 as of June 30, 2021, and June 30, 2020, respectively. 
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