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Revenue Recognition (Tables) | 12 Months Ended
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Mar. 31, 2021
Revenue From Contract With Customer [Abstract] |
Net Sales Disaggregated by Product Line and Geographic Area | The following tables present the Company's net sales disaggregated by product line and geographic area:
|  | Year ended March 31, |
Product Line |  | 2021 |  |  | 2020 |  |  | 2019 |
Heat transfer equipment |  | $ | 41,133 |  |  | $ | 31,986 |  |  | $ | 24,785 |
Vacuum equipment |  |  | 36,792 |  |  |  | 33,354 |  |  |  | 34,461 |
All other |  |  | 19,564 |  |  |  | 25,264 |  |  |  | 32,585 |
Net sales |  | $ | 97,489 |  |  | $ | 90,604 |  |  | $ | 91,831 |
|  | Year ended March 31, |
Geographic Area |  | 2021 |  |  | 2020 |  |  | 2019 |
Asia |  | $ | 25,614 |  |  | $ | 5,517 |  |  | $ | 10,292 |
Canada |  |  | 6,538 |  |  |  | 8,907 |  |  |  | 16,602 |
Middle East |  |  | 4,843 |  |  |  | 13,112 |  |  |  | 2,610 |
South America |  |  | 6,202 |  |  |  | 3,783 |  |  |  | 324 |
U.S. |  |  | 52,724 |  |  |  | 58,042 |  |  |  | 59,441 |
All other |  |  | 1,568 |  |  |  | 1,243 |  |  |  | 2,562 |
Net sales |  | $ | 97,489 |  |  | $ | 90,604 |  |  | $ | 91,831 |
Schedule of Net Contract Assets (Liabilities) | Net contract assets (liabilities) consisted of the following:
|  | March 31, |  |  | March 31, |  |  |  |  |
|  | 2021 |  |  | 2020 |  |  | Change |
Unbilled revenue |  | $ | 19,994 |  |  | $ | 14,592 |  |  | $ | 5,402 |
Customer deposits |  |  | (14,059 | ) |  |  | (26,983 | ) |  |  | 12,924 |
Net (over) under billings |  | $ | 5,935 |  |  | $ | (12,391 | ) |  | $ | 18,326 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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