Nature Of Business And Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Rudolph Technologies, Inc [Member]	Dec. 31, 2013 Rudolph Technologies, Inc [Member]
Investment In Organization [Line Items]
Investments owned, shares					163,917	231,336
Research and development expense	$ 216,000	$ 112,000	$ 381,000	$ 230,000
Other-than-Temporary Impairments Recognized in the Income Statement			$ 0	$ 0

Balance held at close of period in number of shares.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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