Summary of Significant Accounting Policies (Tables)
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Sep. 30, 2013
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Allowance for Bad Debts |
The allowance for bad debts for the nine months ended September 30, 2013 is comprised of the following:
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Estimated Useful Lives of Property and Equipment |
The estimated useful lives of property and equipment are as follows:
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Changes in Warranty Liability |
Changes in the warranty liability for the nine months ended September 30, 2013 are as follows:
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Valuation Assumptions used in Computation of Stock Option Expense |
For the nine months ended September 30, 2012, the Company computed expense for each group utilizing the following assumptions:
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