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Note F - Debt Facilities (Details) (USD $) | 1 Months Ended | 6 Months Ended |  |  |  | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 24, 2013 | Jun. 30, 2013 | Sep. 30, 2012 | Oct. 31, 2013 | Oct. 31, 2012 | Apr. 30, 2013 | Sep. 20, 2012 | Mar. 09, 2012 | Oct. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] | Feb. 04, 2013 Minimum [Member] | Feb. 04, 2013 Maximum [Member]
Note F - Debt Facilities (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End |  |  |  | 2.42% |  | 2.70% |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | $ 145,000,000 |  |  | $ 145,000,000 | $ 125,000,000 |  |  |
Contract Term Of Contracts Included By Credit Facilities Amendment |  |  |  |  |  |  |  |  |  | 36 months | 42 months
Line of Credit Facility, Expiration Date | Jun. 30, 2016 |  |  | Jun. 30, 2016 |  |  |  |  |  |  |
Line of Credit Facility, Additional Borrowing Capacity | 55,000,000 |  |  |  |  |  |  |  |  |  |
Decrease in Pricing Tiers, Percent | 0.25% |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  | 2.25% |  |
Dividend Restrictions, Maximum Aggregate Amount of Stock Repurchases |  |  |  | 40,000,000 |  |  |  |  |  |  |
Dividend Restrictions, Percentage of Sum of Borrowing Bases |  |  |  | 25.00% |  |  |  |  |  |  |
Dividend Restrictions, Percentage of Consolidated Net income |  |  |  | 75.00% |  |  |  |  |  |  |
Dividend Restrictions, Minimum Percentage of Aggregate Funds Available |  |  |  | 12.50% |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  |  | 41,000,000 |  |  |  |  |  |  |
Debt Issuance Cost |  | 200,000 | 42,000 |  |  |  |  |  |  |  |
Amortization of Financing Costs and Discounts |  |  |  | $ 118,000 | $ 110,000 |  |  |  |  |  |

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- Definition Amount of noncash expense included in interest expense to allocate debt discount and premium, and the costs to issue debt and obtain financing over the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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