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Amount of fair value of reporting unit in excess of carrying amount.

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Percentage of fair value of reporting unit in excess of carrying amount.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Summary of Significant Accounting Policies (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Research and Development
Research and development expense	$ 1,300,000	$ 1,200,000	$ 900,000
Minimum
Intangible Assets
Estimated useful lives of intangible assets with a definite life	5 years
Maximum
Intangible Assets
Estimated useful lives of intangible assets with a definite life	14 years
Stock options
Share-Based Compensation
Share-based compensation cost	132,774	141,499	213,716
Assumptions used to determine the intrinsic fair market value of the options
Expected volatility (as a percent)	56.90%
Risk-free interest rate (as a percent)	0.39%
Expected term	5 years
Weighted average grant date fair value of options granted (in dollars per share)	$ 7.72	$ 5.75	$ 3.89
Total income tax benefit recognized	270,000	359,000	316,600
Stock options \| Minimum
Assumptions used to determine the intrinsic fair market value of the options
Expected volatility (as a percent)		54.80%	65.80%
Risk-free interest rate (as a percent)		0.90%	2.00%
Expected term		4 years 7 months 6 days	4 years 1 month 6 days
Stock options \| Maximum
Assumptions used to determine the intrinsic fair market value of the options
Expected volatility (as a percent)		73.30%	83.40%
Risk-free interest rate (as a percent)		2.90%	3.20%
Expected term		7 years 8 months 12 days	7 years 10 months 24 days
Selling, general, and administrative expenses
Share-Based Compensation
Share-based compensation cost	860,405	1,088,672	963,710
Component Products
Goodwill
Amount of excess of fair value over carrying value of the reporting unit	37,000,000
Percentage of excess of fair value over carrying value of the reporting unit	161.00%
Molded Fiber reporting units
Goodwill
Amount of excess of fair value over carrying value of the reporting unit	$ 7,000,000
Percentage of excess of fair value over carrying value of the reporting unit	190.00%