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Intangible Assets | 12 Months Ended
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Mar. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract] |
Intangible Assets | Note 4 – Intangible Assets: Intangible assets are comprised of the following:
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
At March 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Intangibles subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 2,700 |  |  | $ | 1,132 |  |  | $ | 1,568 |
Intangibles not subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |
Permits |  | $ | 10,300 |  |  | $ | — |  |  | $ | 10,300 |
Tradename |  |  | 2,500 |  |  |  | — |  |  |  | 2,500 |
|  | $ | 12,800 |  |  | $ | — |  |  | $ | 12,800 |
At March 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |
Intangibles subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 2,700 |  |  | $ | 952 |  |  | $ | 1,748 |
Intangibles not subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |
Permits |  | $ | 10,300 |  |  | $ | — |  |  | $ | 10,300 |
Tradename |  |  | 2,500 |  |  |  | — |  |  |  | 2,500 |
|  | $ | 12,800 |  |  | $ | — |  |  | $ | 12,800 |
Intangible assets are amortized on a straight line basis over their estimated useful lives. Intangible amortization expense was $180 in each of fiscal 2017, fiscal 2016 and fiscal 2015. As of March 31, 2017, amortization expense is estimated to be $180 in each of the fiscal years ending March 31, 2018, 2019, 2020, 2021 and 2022. There was no change in goodwill during fiscal 2017 or fiscal 2016. Goodwill was $6,938 at March 31, 2017 and 2016.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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