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Intangible Assets | 12 Months Ended
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Mar. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract] |
Intangible Assets | Note 4 – Intangible Assets: Intangible assets are comprised of the following:
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Impairment Loss |  |  | Net Carrying Amount |
At March 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 2,700 |  |  | $ | 1,312 |  |  | $ | — |  |  | $ | 1,388 |
Intangibles not subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Permits |  | $ | 10,300 |  |  | $ | — |  |  | $ | 8,600 |  |  | $ | 1,700 |
Tradename |  |  | 2,500 |  |  |  | — |  |  |  | 500 |  |  |  | 2,000 |
|  | $ | 12,800 |  |  | $ | — |  |  | $ | 9,100 |  |  | $ | 3,700 |
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 |
Finite-lived intangible assets are amortized on a straight-line basis over their estimated useful lives. Intangible amortization expense was $180 in each of fiscal 2018, fiscal 2017 and fiscal 2016. As of March 31, 2018, amortization expense is estimated to be $180 in each of the fiscal years ending March 31, 2019, 2020, 2021, 2022 and 2023. During the third quarter of fiscal 2018, the Company performed its annual goodwill and intangible asset impairment review. The Company assesses impairment by comparing the fair value of its reporting units and intangible assets to their related carrying value. The Company estimated the fair value of intangible assets and goodwill of its commercial nuclear power business related to the December 2010 acquisition of Energy Steel using the income approach. Under the income approach, the fair value of the business is calculated based on the present value of estimated future cash flows. Cash flow projections are based on management’s estimates of revenue growth rates and operating margins, taking into consideration industry and market conditions. The discount rate used is based on a weighted average cost of capital adjusted for the relevant risk associated with the characteristics of the business and the projected cash flows. The inputs utilized in the analyses are classified as Level 3 inputs within the fair value hierarchy. The impairment review indicated that the fair value of the permits, tradename and goodwill of the business were substantially lower than the carrying value due to reduced investment from the U.S. nuclear power market, the strength of the Energy Steel brand relative to larger more vertically integrated suppliers, and the bankruptcy of Westinghouse Electric Company which resulted in the stoppage of work at the Summer, South Carolina nuclear facility. As a result, in the third quarter of fiscal 2018 the Company recorded impairment losses of $8,600, $500, and $5,716 for permits, tradename and goodwill, respectively. Goodwill was $1,222 and $6,938 at March 31, 2018 and 2017, respectively.

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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 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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