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Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Allowance for Doubtful Accounts |  |  |  |  |  |
Balance at Beginning of Year | $ 466 us-gaap_ValuationAllowancesAndReservesBalance |  | $ 327 us-gaap_ValuationAllowancesAndReservesBalance |  | $ 140 us-gaap_ValuationAllowancesAndReservesBalance |
Additions Charged to Costs and Expenses | 279 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense |  | 571 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense |  | 639 us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense |
Deductions | (329)us-gaap_ValuationAllowancesAndReservesDeductions | [1] | (432)us-gaap_ValuationAllowancesAndReservesDeductions | [1] | (452)us-gaap_ValuationAllowancesAndReservesDeductions | [1]
Balance At End of Year | $ 416 us-gaap_ValuationAllowancesAndReservesBalance |  | $ 466 us-gaap_ValuationAllowancesAndReservesBalance |  | $ 327 us-gaap_ValuationAllowancesAndReservesBalance |
[1] | The deductions related to allowance for doubtful accounts represent accounts receivable which are written off.

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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