Note 2. Summary of Significant Accounting Policies (Detail) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Capitalized Computer Software, Net (in Dollars)	$ 1,900,000	$ 1,800,000
Capitalized Computer Software, Amortization (in Dollars)	22,000	21,000	15,000
Research and Development Expense (in Dollars)	$ 1,740,000	$ 1,502,000	$ 1,440,000
Research and Development Expense as Percentage of Annual Sales	3.40%	3.50%	3.20%
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	15 years
Software Development [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Software Development [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years

For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs.

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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- Definition

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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