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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (preferred stock common stock) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Preferred Stock | $ 2,119,000 us-gaap_PreferredStockValue | 5,332,000 us-gaap_PreferredStockValue |
Common Stock | 3,010,000 us-gaap_CommonStockValue | 2,958,000 us-gaap_CommonStockValue |
6% Cumulative Preferred Stock [Member] |  |  |
Preferred Stock, Dividend Rate, Percentage | 6.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.25 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember |  |
Preferred Stock, Shares Authorized | 200,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember |  |
Preferred Stock, Shares Outstanding | 200,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember | 200,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember | 200,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember
Preferred Stock | 50,000 us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_CumulativePreferredStockMember |  |
10% Nonredeemable Convertible Preferred Stock [Member] |  |  |
Preferred Stock, Dividend Rate, Percentage | 10.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.025 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember |  |
Preferred Stock, Shares Authorized | 1,400,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember |  |
Preferred Stock, Shares Outstanding | 807,240 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember | 807,240 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember | 807,240 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember
Preferred Stock | 202,000 us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_NonredeemableConvertiblePreferredStockMember |  |
Participating Preferred Stock [Member] |  |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.025 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Preferred Stock, Shares Authorized | 90,826 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Preferred Stock, Shares Outstanding | 90,826 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 90,901 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 91,962 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember
Preferred Stock | 1,084,000 us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
2003 Series Participating Preferred Stock [Member] |  |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.025 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Preferred Stock, Shares Authorized | 50,500 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Preferred Stock, Shares Outstanding | 50,500 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 257,790 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 262,790 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
Preferred Stock | 783,000 us-gaap_PreferredStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Common Class A Member |  |  |
Common Stock Par Or Stated Value Per Share | $ 0.25 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
Common Stock, Shares Authorized | 20,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
Common Stock, Shares, Outstanding | 7,926,280 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 8,735,714 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 8,705,243 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Stock | 2,506,000 us-gaap_CommonStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
Common Class B Member |  |  |
Common Stock Par Or Stated Value Per Share | $ 0.25 us-gaap_CommonStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Common Stock, Shares Authorized | 10,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Common Stock, Shares, Outstanding | 1,967,958 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,013,953 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,055,424 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common Stock | $ 504,000 us-gaap_CommonStockValue / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |

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