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CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Sep. 30, 2012 | Mar. 31, 2012
--- | --- | ---
Investments at market or fair value |  |
Companies more than 25% owned, Cost | $ 12,679 | $ 14,870
Companies 5% to 25% owned, Cost | 15,594 | 14,003
Companies less than 5% owned, Cost | 66,643 | 60,120
Total investments, Cost | $ 94,916 | $ 88,993
Net Assets |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, authorized (in shares) | 5,000,000 | 5,000,000
Common stock, issued (in shares) | 4,380,956 | 4,339,416
Treasury stock (in shares) | 584,878 | 584,878
Shares outstanding (in shares) | 3,796,078 | 3,754,538

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