Annual report pursuant to Section 13 and 15(d)

Summary of Net Deferred Tax Assets and Net Deferred Tax Liabilities (Detail)

v3.8.0.1
Summary of Net Deferred Tax Assets and Net Deferred Tax Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]    
Capitalized intangible assets for tax purposes $ (21) $ 47
Reserves not currently deductible 1,130 2,117
Deferred revenue 5 8
Stock options 3,600 4,966
State taxes 6 9
Income tax credits 2,640 2,379
Inventory 495 940
Property and equipment 165 201
Other comprehensive income   252
Unrealized gain on foreign currency 84 136
Net operating losses 33,451 43,687
Total deferred tax assets 41,555 54,742
Valuation allowance (40,866) (54,310)
Net deferred tax assets 689 432
Capitalized intangible assets (608) (876)
Other (185) (354)
Total deferred tax liabilities (793) (1,230)
Net deferred tax liabilities $ (104) $ (798)