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Investment in Unconsolidated Subsidiaries - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Jul. 31, 2014
Schedule Of Equity Method Investments [Line Items]              
Profit (loss)   $ (1,574,857)   $ (358,490) $ (4,121,167) $ (333,113)  
Cost of products sold   794,285   829,546 2,298,162 2,624,950  
Milestone Education L L C              
Schedule Of Equity Method Investments [Line Items]              
Profit (loss)   $ 4,686   5,266 $ 10,986 20,910  
Milestone Medical Inc. [Member]              
Schedule Of Equity Method Investments [Line Items]              
Joint venture owned by the investors   50.00%     50.00%    
Contribution of Milestone in joint venture   $ 0     $ 0    
Purchase of additional shares     995,000        
Purchase of additional shares, value     $ 447,750        
Sale of common stock, price per share     $ 0.45        
Percentage of ownership after transaction     49.98%        
Gain (Loss) on earnings from joint venture   (590,612)   (223,834) (1,566,711) (567,550)  
Advances to investment         537,923    
Legal expenses related to marketing clearance   0   44,415 0 175,868  
Investment in joint venture   $ 0 $ 888,720   $ 0    
Equity method investment, ownership percentage   49.98%     49.98%    
Milestone Education LLC [Member]              
Schedule Of Equity Method Investments [Line Items]              
Gain (Loss) on earnings from joint venture   $ 2,343   $ (2,633) $ (5,493) $ (10,455)  
Investment in joint venture   $ 18,700 24,192   $ 18,700    
Percentage of gain/loss on joint venture   50.00%   50.00% 50.00% 50.00%  
Milestone China [Member]              
Schedule Of Equity Method Investments [Line Items]              
Gain (Loss) on earnings from joint venture   $ (123,083)   $ 29,428 $ (187,062) $ 29,428  
Investment in joint venture $ 1,000,000 $ 161,588 $ 348,651 $ 1,000,000 $ 161,588 $ 1,000,000 $ 1,000,000
Percentage of gain/loss on joint venture   40.00%     40.00%    
Distributor price per instrument $ 1,295     $ 1,295   $ 1,295  
Equity method investment, ownership percentage 40.00%     40.00%   40.00% 40.00%
Delivery period 2 years            
Percentage of revenue recognized on shipments         60.00%    
Deferred revenue   $ 0     $ 0    
Milestone China [Member] | STA Instrument [Member]              
Schedule Of Equity Method Investments [Line Items]              
Cost of products sold         938,304    
Milestone China [Member] | Handpieces [Member]              
Schedule Of Equity Method Investments [Line Items]              
Cost of products sold         $ 138,600    
Milestone China [Member] | Handpieces and STA Instrument [Member]              
Schedule Of Equity Method Investments [Line Items]              
Percentage of revenue recognized on shipments         60.00%    
Milestone China [Member] | Third Party [Member]              
Schedule Of Equity Method Investments [Line Items]              
Percentage of revenue recognized on shipments         40.00%