Annual report pursuant to Section 13 and 15(d)

Note 7 - Balance Sheet Components - Schedule of Property, Plant and Equipment (Detail)

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Note 7 - Balance Sheet Components - Schedule of Property, Plant and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 7,362 $ 10,653
Less: accumulated depreciation and amortization (4,119) (3,960)
Property and equipment, net 3,243 6,693
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 55 54
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 2,504 3,227
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 3,521 3,621
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 334 1,146
Manufacturing And Lab Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 3 1,659
Displays [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 483 483
Website [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 462 $ 463