Line of Credit - Additional Information (Detail) - Agreement [Member] - Silicon Valley Bank [Member] - USD ($)
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12 Months Ended |
Mar. 27, 2014 |
Dec. 31, 2016 |
| Line of Credit Facility [Line Items] |
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| Line of credit facility, maximum borrowing capacity |
$ 2,000,000
|
$ 3,000,000
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| Line of credit facility, addition of sublimit |
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$ 2,000,000
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| Line of credit facility, interest rate description |
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Borrowings under the Credit Facility bear interest based on the face amount of financed receivables at the prime rate plus 4.5% for domestic receivables and 3.53% for foreign receivables, or, in the case of Mexican Peso borrowings, at the prime rate based on the borrowed amount.
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| Amounts drawn against the Credit Facility |
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$ 0
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| Line of credit facility available |
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$ 3,000,000
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| Credit facility maturity date |
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Sep. 27, 2017
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| Domestic receivables [Member] |
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| Line of Credit Facility [Line Items] |
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| Eligible accounts receivable, advance rate |
80.00%
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| Domestic receivables [Member] | Prime rate [Member] |
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| Line of Credit Facility [Line Items] |
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| Credit Facility interest rate |
4.50%
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| Foreign receivables [Member] |
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| Line of Credit Facility [Line Items] |
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| Eligible accounts receivable, advance rate |
70.00%
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| Foreign receivables [Member] | Prime rate [Member] |
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| Line of Credit Facility [Line Items] |
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| Credit Facility interest rate |
3.53%
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| Mexican Peso Deposits [Member] |
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| Line of Credit Facility [Line Items] |
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| Advance rate against deposits |
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70.00%
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