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Fair Value Measurements (Fair Value Measurements On A Recurring Basis) (Details) (USD $)
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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|
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| Cash and cash equivalents, Carrying amount |
$ 1,505,000 |
$ 1,102,000 |
$ 5,476,000 |
| Treasury bills, fair value |
5,227,000 |
5,248,000 |
|
| Available for sale Securities |
7,945,000 |
8,925,000 |
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Small Cap Technology Sector [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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|
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| Available-for-sale Securities, Carrying amount |
2,718,000 |
3,677,000 |
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| Available for sale Securities |
2,718,000 |
3,677,000 |
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Small Cap Technology Sector [Member] | Fair Value, Inputs, Level 1 [Member]
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|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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|
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| Available for sale Securities |
2,718,000 |
3,677,000 |
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Small Cap Technology Sector [Member] | Fair Value, Inputs, Level 2 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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|
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| Available for sale Securities |
0 |
0 |
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Small Cap Technology Sector [Member] | Fair Value, Inputs, Level 3 [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Available for sale Securities |
0 |
0 |
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Money Market [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Cash and cash equivalents, Carrying amount |
540,000 |
804,000 |
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| Cash and cash equivalents, Fair Value |
540,000 |
804,000 |
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Money Market [Member] | Fair Value, Inputs, Level 1 [Member]
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|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
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| Cash and cash equivalents, Fair Value |
540,000 |
804,000 |
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Money Market [Member] | Fair Value, Inputs, Level 2 [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Cash and cash equivalents, Fair Value |
0 |
0 |
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Money Market [Member] | Fair Value, Inputs, Level 3 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Cash and cash equivalents, Fair Value |
0 |
0 |
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Commercial Paper [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Cash and cash equivalents, Carrying amount |
601,000 |
200,000 |
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| Cash and cash equivalents, Fair Value |
601,000 |
200,000 |
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Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Cash and cash equivalents, Fair Value |
601,000 |
200,000 |
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Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Cash and cash equivalents, Fair Value |
0 |
0 |
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Commercial Paper [Member] | Fair Value, Inputs, Level 3 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Cash and cash equivalents, Fair Value |
0 |
0 |
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Treasury Bills [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Treasury bills, carrying value |
5,227,000 |
5,248,000 |
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| Treasury bills, fair value |
5,227,000 |
5,248,000 |
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Treasury Bills [Member] | Fair Value, Inputs, Level 1 [Member]
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|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
|
| Treasury bills, fair value |
5,227,000 |
5,248,000 |
|
|
Treasury Bills [Member] | Fair Value, Inputs, Level 2 [Member]
|
|
|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
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| Treasury bills, fair value |
0 |
0 |
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Treasury Bills [Member] | Fair Value, Inputs, Level 3 [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Treasury bills, fair value |
$ 0 |
$ 0 |
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