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Basis of Presentation (Details) Other Balance Sheet and Income Statement Items (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Other Balance Sheet and Income Statement Items [Line Items]
Software subscription agreements, term			1 year
Inventory, Raw Materials:
Raw materials inventory	$ 7,000,000		$ 7,000,000		$ 8,100,000
Provision for Income Taxes:
Income tax provision (benefit)	$ (114,000)	$ 125,000	$ (898,000)	$ (1,073,000)
Effective income tax rate	1.00%	(1.00%)	3.00%	6.00%
Statutory income tax rate			35.00%
Maximum
Provision for Income Taxes:
Likelihood uncertain tax percentage will be sustained			50.00%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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