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Fair Value Measurements (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 05, 2015 | Dec. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Sep. 30, 2018 | Sep. 30, 2017 | Jan. 22, 2018 | Dec. 31, 2017 | Oct. 20, 2017 | Nov. 01, 2016
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment for contingent consideration |  |  | $ 2,348,000 | $ 0 | [1] |  |  |  |  |  |
Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  | $ 10,147,000 | 8,527,000 | $ 8,263,000 |  | $ 10,065,000 | $ 6,388,000 |  | $ 5,981,000 |  |
Contingent Consideration | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  | 0 |  |  | 0 |  |  |  |  |
Contingent Consideration | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  | 0 |  |  | 0 |  |  |  |  |
Contingent Consideration | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  | $ 8,527,000 |  |  | 10,065,000 |  |  |  |  |
Bluenica Corporation |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earn-out payment installment period | 4 years |  |  |  |  |  |  |  |  |  |
Bluenica Corporation | Minimum | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value inputs probability of payment |  |  | 95.00% |  |  |  |  |  |  |  |
Bluenica Corporation | Maximum | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value inputs probability of payment |  |  | 100.00% |  |  |  |  |  |  |  |
Bluenica Corporation | Contingent Consideration |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment for contingent consideration |  |  | $ 2,200,000 |  |  |  |  |  |  |  |
Bluenica Corporation | Contingent Consideration | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment for Contingent Consideration Liability, Investing Activities |  |  |  |  |  | 0 | $ 500,000 |  |  |  |
FreshTemp | Contingent Consideration |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment for contingent consideration |  | $ 200,000 |  |  |  |  |  |  |  |  |
TempAlert | Maximum | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value inputs probability of payment |  |  | 0.00% |  |  |  |  |  |  |  |
Accelerated | Maximum | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value inputs probability of payment |  |  | 70.00% |  |  |  |  |  |  |  |
Estimate of Fair Value Measurement | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  | $ 8,527,000 |  |  | $ 10,065,000 |  |  |  |  |
Estimate of Fair Value Measurement | Bluenica Corporation | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value | $ 10,400,000 |  | 3,200,000 |  |  |  |  |  |  |  |
Estimate of Fair Value Measurement | FreshTemp | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  |  |  |  |  |  |  |  |  | $ 1,300,000
Estimate of Fair Value Measurement | TempAlert | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  | 0 |  |  |  |  |  |  | $ 0 |
Estimate of Fair Value Measurement | Accelerated | Contingent Consideration | Fair Value, Measurements, Recurring |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contingent consideration fair value |  |  | $ 5,400,000 |  |  |  |  | $ 2,300,000 |  |  |
[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.

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