Annual report pursuant to Section 13 and 15(d)

Schedule II -Valuation And Qualification Accounts (Detail)

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Schedule II -Valuation And Qualification Accounts (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Balance at Beginning of Period $ 624 $ 487 $ 666
Charges to Expense 241 137 (179)
Deductions 0 0 0
Balance at End of Period 865 624 487
Doubtful Accounts      
Balance at Beginning of Period 0 0 0
Charges to Expense 29 0 0
Deductions 0 0 0
Balance at End of Period 29 0 0
Inventory      
Balance at Beginning of Period 624 487 666
Charges to Expense [1] 212 137 (179)
Deductions 0 0 0
Balance at End of Period $ 836 $ 624 $ 487
[1] Net change in inventory allowance, excluding iWear net realizable writedown.