Annual report pursuant to Section 13 and 15(d)

Components of Accounts Receivable, Net of Allowance (Detail)

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Components of Accounts Receivable, Net of Allowance (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Components of accounts receivable, net of allowances    
Trade $ 9,699 $ 8,850
Royalties 62 61
Other 23 37
Total receivables, net $ 9,784 $ 8,948