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Note D - Financing Arrangements (Details) (USD $) | 12 Months Ended | 0 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 17, 2013 London Interbank Offered Rate (LIBOR) [Member] Bank Line Of Credit Maturing August 2015 [Member] | Dec. 06, 2013 London Interbank Offered Rate (LIBOR) [Member] Promissory Note [Member] | Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] Bank Line Of Credit Maturing May 2014 [Member] | Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] | Dec. 17, 2013 Bank Line Of Credit Maturing August 2015 [Member] | Dec. 17, 2012 Bank Line Of Credit Maturing August 2015 [Member] | Dec. 06, 2013 Promissory Note [Member] | Dec. 31, 2013 Bank Line Of Credit Maturing May 2014 [Member] | Dec. 31, 2012 Bank Line Of Credit Maturing November 2012 [Member] | Dec. 31, 2013 Bank Line Of Credit Maturing May 2012 [Member]
Note D - Financing Arrangements (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured Debt |  |  |  |  |  |  |  |  | $ 17,000,000 |  | $ 10,000,000 |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 0.75% | 0.75% | 0.75% | 0.75% |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding | 20,000,000 | 19,300,000 |  |  |  |  |  | 3,000,000 |  |  |  |  |
Notes Payable |  |  |  |  |  |  |  |  |  | 6,000,000 |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount |  | 5,100,000 |  |  |  |  |  |  |  |  |  | 700,000 | 4,000,000
Line of Credit Facility, Remaining Borrowing Capacity | 6,000,000 | 4,900,000 |  |  |  |  |  |  |  |  |  |  |
Interest Expense, Debt | 146,000 | 122,000 | 179,000 |  |  |  |  |  |  |  |  |  |
Operating Leases, Rent Expense | $ 1,109,000 | $ 1,068,000 | $ 866,000 |  |  |  |  |  |  |  |  |  |

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