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Acquisition (Details)
6 Months Ended 9 Months Ended
Jan. 22, 2018
USD ($)
Oct. 20, 2017
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
[1]
Jun. 30, 2018
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2018
USD ($)
Business Acquisition [Line Items]              
Contingent consideration paid     $ 810,000 $ (425,000)      
Accelerated              
Business Acquisition [Line Items]              
Cash paid at closing $ 16,400,000            
Cash acquired $ 200,000            
Earn-out payment installments 2            
TempAlert              
Business Acquisition [Line Items]              
Cash paid at closing   $ 40,700,000          
Cash acquired   600,000          
Earn-out payments | Accelerated              
Business Acquisition [Line Items]              
Earn-out payment maximum $ 4,500,000            
Additional earn-out payment | Accelerated              
Business Acquisition [Line Items]              
Earn-out payment maximum 2,000,000            
Fair Value, Measurements, Recurring | Contingent Consideration | Estimate of Fair Value Measurement              
Business Acquisition [Line Items]              
Contingent consideration fair value     8,527,000       $ 10,065,000
Fair Value, Measurements, Recurring | Contingent Consideration | Estimate of Fair Value Measurement | Accelerated              
Business Acquisition [Line Items]              
Contingent consideration fair value $ 2,300,000   5,400,000        
Contingent consideration paid         $ 3,500,000    
Fair Value, Measurements, Recurring | Contingent Consideration | Estimate of Fair Value Measurement | TempAlert              
Business Acquisition [Line Items]              
Contingent consideration fair value   $ 0 $ 0        
Forecast | Earn-out payments | TempAlert              
Business Acquisition [Line Items]              
Earn-out payment maximum           $ 45,000,000  
[1] Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which we adopted on October 1, 2018.