Annual report pursuant to Section 13 and 15(d)

Note 2 - Accounting Policies - Estimated Lives of Property and Equipment (Detail)

v3.6.0.2
Note 2 - Accounting Policies - Estimated Lives of Property and Equipment (Detail)
12 Months Ended
Dec. 31, 2016
Displays [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Estimated Useful Life (in years) 5 years
Manufacturing And Lab Equipment [Member] | Minimum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Estimated Useful Life (in years) 3 years
Manufacturing And Lab Equipment [Member] | Maximum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Estimated Useful Life (in years) 5 years
Website [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Estimated Useful Life (in years) 3 years
Vehicles [Member] | Minimum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Estimated Useful Life (in years) 3 years
Vehicles [Member] | Maximum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Estimated Useful Life (in years) 5 years
Furniture and Fixtures [Member] | Minimum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Estimated Useful Life (in years) 3 years
Furniture and Fixtures [Member] | Maximum [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Estimated Useful Life (in years) 7 years
Leasehold Improvements [Member]  
Accounting Policies [Line Items]  
Property, Plant and Equipment, Leasehold Improvements Lesser of estimated useful life or remaining lease term