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Purchased Technology (Details Textual) (USD $)	12 Months Ended
Purchased Technology (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Purchased Technology (Textual) [Abstract]
Impairment of purchased technology		$ 598,000
Purchased Technology [Member]
Purchased Technology (Textual) [Abstract]
Annual amortization of purchased technology	0	200,000
Expiration date of patents	Jun. 30, 2014
Impairment of purchased technology	$ 600,000	$ 598,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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