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Summary of Significant Accounting Policies (Details Textual) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Summary of Significant Accounting Policies (Textual) [Abstract] |  |
Warranty expense | $ 87,544 | $ 63,445
Non-Warranty repair income | 107,868 | 100,017
Long-lived assets for impairment | 0 | 0
Advertising expenses | 51,412 | 83,764
Weighted-average fair value of the individual options granted | $ 0.95 | $ 0.33
Payment of materials in advance | 2,827,000 | 3,407,000
Rate of shareholder of the company | 5.00% |
Company purchased from supplier | 1,966,077 | 2,006,885
Owed by company | 808,908 | 1,207,280
Write-off of Investment | $ 76,319 |
Options [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Outstanding options and warrants | 1,523,740 | 1,599,281
CompuDent Instruments [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Number of instruments on purchase agreement | 5,000 |
STA Instruments [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Number of instruments on purchase agreement | 12,000 |
Corporate Joint Venture [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Investment on the equity | 50.00% |
Maximum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Estimated useful lives | Seven Years |
Impairment periodically | 20.00% |
Minimum [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Estimated useful lives | Five years |

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