v3.3.1.900
Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Current deferred tax assets:    
Total $ 504 $ 478
Non-current deferred tax assets:    
Total 3,357 3,402
Valuation allowance (3,861) (3,880)
Net deferred tax assets 0 0
Deferred Tax Current [Member]    
Current deferred tax assets:    
Allowance for bad debts 34 33
Share-based payment expense 220 145
Allowance for obsolete inventory 98 119
Accrued compensation 77 75
Contribution carryover 2  
Other accruals 73 106
Deferred Tax Non-current [Member]    
Non-current deferred tax assets:    
Depreciation 11 5
Capital loss 179 178
Net operating loss 3,118 3,170
Credit carryover $ 49 $ 49