Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Additional Information (Detail)

v3.6.0.2
Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2016
USD ($)
Segment
Customer
Dec. 31, 2015
USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]    
Number of dental distributor with guaranteed rights of returns | Customer 2  
Revenue deferred under guaranteed rights of return arrangements $ 0 $ 14,215
Deferred revenue $ 0  
Cash and cash equivalents with original maturity period Three months or less  
Accounts receivable $ 0  
Allowance for doubtful accounts 0 1,400
Inventory reserve 0 60,660
Inventory, net $ 0 321,509
Number of business operating segment | Segment 1  
Impairment losses $ 0 0
Advertising and marketing expense $ 36,030 35,887
Uncertain income tax position, unrecognized Less than a 50%  
Uninsured portion of cash balance $ 3,830,618 $ 4,833,355
Leasehold Improvements [Member]    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of assets 3 years  
Minimum [Member]    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of assets 3 years  
Maximum [Member]    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]    
Estimated useful lives of assets 7 years