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Note 7 - Fair Value Measurements (Tables)
6 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

Total Carrying Value

  

Quoted Prices in Active Markets (Level 1)

  

Significant Other Observable Inputs (Level 2)

  

Significant Unobservable Inputs (Level 3)

 

September 30, 2021:

                

Assets:

                

Cash equivalents

 $20,108  $20,108  $  $ 

Marketable securities

 $-  $-  $  $ 

Derivative liabilities:

                

Contingent consideration

 $4,720  $  $  $4,720 
  Total Carrying Value  Quoted Prices in Active Markets (Level 1)  Significant Other Observable Inputs (Level 2)  Significant Unobservable Inputs (Level 3) 

March 31, 2021:

                

Assets:

                

Cash equivalents

 $54,104  $54,104  $  $ 

Marketable securities

 $5,140  $5,140  $  $ 

Derivative liabilities:

                

Contingent consideration

 $7,050  $  $  $7,050 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Acquisition Contingent Consideration

 

Balance at March 31, 2021

 $7,050 

Change in fair value

  (2,330)

Balance at September 30, 2021

 $4,720