Summary of Significant Accounting Policies (Tables)
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3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2014
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Changes in Warranty Liability |
Changes in the Company’s warranty liability for the three months ended March 31, 2014, and 2013 are as follows:
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Summary of Changes in Allowance for Doubtful Accounts |
The following summarizes the changes in the allowance for doubtful accounts for the periods indicated.
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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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