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Notes Payable - Additional Information (Detail) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 23, 2017 USD ($) | Dec. 29, 2015 USD ($) CreditFacility | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |
Borrowings outstanding |  |  | $ 5,700,000 | $ 5,543,000
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, agreement date |  |  | Dec. 29, 2015 |
Number of revolving credit facilities | CreditFacility |  | 2 |  |
Additional borrowing capacity |  |  | $ 0 |
Credit facility's interest rate, Description |  |  | Interest rate on both facilities is the three month LIBOR (0.98% at December 31, 2016) plus 4.00% per year. |
Leverage test of total liabilities to total net worth |  | 1.25 |  |
Borrowings outstanding |  |  | $ 5,700,000 | $ 5,540,000
Revolving Credit Facility | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Fixed charge coverage ratio |  | 125.00% |  |
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument variable interest rate |  |  | 0.98% |
Credit facility's interest rate |  | 4.00% |  |
Facility A |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 4,000,000 |  |
Line of credit term |  | 2 years |  |
Revolving credit agreement maturity date |  | Dec. 29, 2017 |  |
Amount borrowed under revolving credit facility |  | $ 1,040,000 | $ 1,500,000 |
Letter of credit outstanding amount |  |  | 1,250,000 |
Facility B |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 4,500,000 |  |
Revolving credit agreement maturity date |  | Dec. 29, 2020 |  |
Amount borrowed under revolving credit facility |  | $ 4,500,000 | $ 4,200,000 |
Line of credit facility, borrowing capacity, description |  |  | The amount available to borrow under Facility B declines from the initial $4.50 million by $0.15 million each six months. |
Revolving line of credit decline term |  |  | 6 months |
Decline in revolving line of credit |  | $ 150,000 |  |
Senior Secured Term Note | Subsequent Event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt principal amount | $ 7,000,000 |  |  |
Proceeds from debt used as working capital | 1,000,000 |  |  |
Debt principal periodic payment amount | $ 500,000 |  |  |
Debt instrument, interest payment frequency | Monthly interest only payments |  |  |
Debt instrument, payment terms | The Note is payable in monthly interest only payments, in arrears, with $0.50 million of principal repayable no later than June 30, 2017 and the balance due March 23, 2021. |  |  |
Fixed interest rate | 11.50% |  |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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