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Share-based Payments (Details) - shares | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014 | Mar. 28, 2013 | Mar. 27, 2013 | Feb. 25, 2010 | Feb. 24, 2010 | Dec. 17, 2003
Stock Options [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Option to purchase common stock, outstanding (in shares) | 984,066 | 1,389,254 |  |  |  |  |  |
2003 Long-Term Incentive Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate number of stock options approved (in shares) |  |  |  |  |  |  |  | 1,200,000
Option to purchase common stock, outstanding (in shares) | 89,350 | 438,750 |  |  |  |  |  |
Options available for grant (in shares) | 0 | 0 |  |  |  |  |  |
Incentive plan, expiration date | Oct. 31, 2013 |  |  |  |  |  |  |
2004 Non-Employee Director Stock Option Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate number of stock options approved (in shares) |  |  |  |  |  | 275,000 | 175,000 |
Option to purchase common stock, outstanding (in shares) | 154,000 | 183,000 |  |  |  |  |  |
Options available for grant (in shares) | 0 | 0 |  |  |  |  |  |
2010 Incentive Award Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate number of stock options approved (in shares) |  |  | 2,750,000 | 1,750,000 | 750,000 |  |  |
Option to purchase common stock, outstanding (in shares) | 740,716 | 767,504 |  |  |  |  |  |
Options available for grant (in shares) | 964,039 | 1,165,740 |  |  |  |  |  |
2010 Incentive Award Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares issued (in shares) | 137,321 | 170,787 |  |  |  |  |  |
2014 Non-Employee Director Incentive Award Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Aggregate number of stock options approved (in shares) |  |  | 342,000 |  |  |  |  |
Options available for grant (in shares) | 308,411 | 323,885 |  |  |  |  |  |
Number of shares issued (in shares) | 0 | 0 |  |  |  |  |  |
2014 Non-Employee Director Incentive Award Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares issued (in shares) | 16,206 | 10,656 |  |  |  |  |  |

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- Definition Date the equity-based award expires, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share instruments newly issued under a share-based compensation plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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