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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jul. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Jun. 30, 2014
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Due period for credit sales |  | 90 days |  |
Warranty expense |  | $ 73,539 | $ 79,017 |
Non-Warranty repair income |  | 39,264 | 60,473 |
Long-lived assets for impairment |  | 0 | 0 |
Advertising expenses |  | $ 33,570 | $ 26,569 |
Weighted-average fair value of the individual options granted |  | $ 3.01 | $ 2.18 |
Deferred Tax assets |  | $ 0 | $ 0 |
Deferred Tax liabilities |  | $ 0 | $ 0 |
Options [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Outstanding options and warrants |  | 1,427,769 | 1,488,796 |
Minimum [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful lives |  | 5 years |  |
Maximum [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful lives |  | 7 years |  |
Milestone China [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Equity method investment, ownership percentage | 40.00% |  |  | 40.00%
Milestone Advanced Cosmetic System Inc |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Equity method investment, ownership percentage | 50.00% |  |  |
Ownership percentage attributable to Milestone |  | 70.00% |  |
Milestone China Investment In Milestone Advanced Cosmetic System I N C |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Equity method investment, ownership percentage | 50.00% |  |  |
Capital contributions | $ 900,000 |  |  |

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