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Note 2 - Revenue Recognition (Tables) | 12 Months Ended
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Mar. 31, 2020
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Year Ended March 31, 2020 |
|  | Sterilization and Disinfection Control |  |  | Instruments |  |  | Biopharmaceutical Development |  |  | Continuous Monitoring |  |  | Corporate and Other |  |  | Total |
Discrete Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consumables |  | $ | 42,654 |  |  | $ | 3,197 |  |  | $ | 4,981 |  |  | $ | 43 |  |  | $ | 2,436 |  |  | $ | 53,311 |
Hardware and Software |  |  | 551 |  |  |  | 25,627 |  |  |  | 6,015 |  |  |  | 7,897 |  |  |  | -- |  |  |  | 40,090 |
Services |  |  | 1,592 |  |  |  | 9,160 |  |  |  | 1,761 |  |  |  | 2,396 |  |  |  | 27 |  |  |  | 14,936 |
Contracted Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services |  |  | 4,863 |  |  |  | -- |  |  |  | 1,094 |  |  |  | 3,393 |  |  |  | -- |  |  |  | 9,350 |
Total Revenues |  | $ | 49,660 |  |  | $ | 37,984 |  |  | $ | 13,851 |  |  | $ | 13,729 |  |  | $ | 2,463 |  |  | $ | 117,687 |
|  | Year Ended March 31, 2019 |
|  | Sterilization and Disinfection Control |  |  | Instruments |  |  | Biopharmaceutical Development |  |  | Continuous Monitoring |  |  | Corporate and Other |  |  | Total |
Discrete Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consumables |  | $ | 39,670 |  |  | $ | 3,101 |  |  | $ | -- |  |  | $ | 388 |  |  | $ | 6,430 |  |  | $ | 49,589 |
Hardware and Software |  |  | 580 |  |  |  | 24,500 |  |  |  | -- |  |  |  | 6,987 |  |  |  | 142 |  |  |  | 32,209 |
Services |  |  | 1,209 |  |  |  | 8,524 |  |  |  | -- |  |  |  | 2,001 |  |  |  | 335 |  |  |  | 12,069 |
Contracted Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services |  |  | 4,838 |  |  |  | -- |  |  |  | -- |  |  |  | 4,430 |  |  |  | -- |  |  |  | 9,268 |
Total Revenues |  | $ | 46,297 |  |  | $ | 36,125 |  |  | $ | -- |  |  | $ | 13,806 |  |  | $ | 6,907 |  |  | $ | 103,135 |
|  | Year Ended March 31, 2018 |
|  | Sterilization and Disinfection Control |  |  | Instruments |  |  | Biopharmaceutical Development |  |  | Continuous Monitoring |  |  | Corporate and Other |  |  | Total |
Discrete Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consumables |  | $ | 36,436 |  |  | $ | 3,080 |  |  | $ | -- |  |  | $ | 261 |  |  | $ | 5,197 |  |  | $ | 44,974 |
Hardware and Software |  |  | 925 |  |  |  | 23,345 |  |  |  | -- |  |  |  | 5,051 |  |  |  | 91 |  |  |  | 29,412 |
Services |  |  | 1,110 |  |  |  | 7,679 |  |  |  | -- |  |  |  | 2,017 |  |  |  | 549 |  |  |  | 11,355 |
Contracted Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Services |  |  | 4,789 |  |  |  | -- |  |  |  | -- |  |  |  | 5,649 |  |  |  | -- |  |  |  | 10,438 |
Total Revenues |  | $ | 43,260 |  |  | $ | 34,104 |  |  | $ | -- |  |  | $ | 12,978 |  |  | $ | 5,837 |  |  | $ | 96,179 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
Contract liabilities balance as of March 31, 2019 |  | $ | 4,426 |
Prior year liabilities recognized in revenues during the Year Ended March 31, 2020 |  |  | (4,741 | )
Contract liabilities added during the Year Ended March 31, 2020, net of revenues recognized |  |  | 7,532 |
Contract liabilities balance as of March 31, 2020 |  | $ | 7,217 |

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