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, 2018
Dec. 31, 2017
Dec. 31, 2016
Balance at Beginning of Period $ 865 $ 624 $ 487
Charges to Expense 310 241 137
Deductions (804) 0 0
Balance at End of Period 371 865 624
Doubtful Accounts      
Balance at Beginning of Period 29 0 0
Charges to Expense 7 29 0
Deductions (29) 0 0
Balance at End of Period 7 29 0
Inventory      
Balance at Beginning of Period 836 624 487
Charges to Expense 303 212 [1] 137 [1]
Deductions (775) [2] 0 0
Balance at End of Period $ 364 $ 836 $ 624
[1] Net change in inventory allowance, excluding iWear net realizable value write-down.
[2] Deductions in 2018 primarily related to the disposal of raw components related to the discontinuance of our iWear product.