Borrowings - Additional Information (Detail) shares in Thousands			6 Months Ended	12 Months Ended	18 Months Ended
	Feb. 05, 2016 USD ($) shares	Jan. 02, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jan. 02, 2016 USD ($)	Jun. 30, 2016	Jul. 01, 2016	Jan. 03, 2015 USD ($)
Line of Credit Facility [Line Items]
Revolving loan payable				$ 11,759,000			$ 11,022,000
Total capital leases payable				10,689,000
JPMorgan Chase Bank | Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity				25,000,000
Maximum revolving commitment upon fulfillment of certain conditions				$ 40,000,000
Line of credit facility maturity date				Apr. 26, 2017
Revolving loan payable				$ 11,759,000
Maximum aggregate principal amount of indebtedness allowed for capital lease obligations				$ 1,500,000
Unused capacity commitment fee percentage				0.25%
Minimum availability required trigger amount (if less than)		$ 4,000,000		$ 2,400,000
Excess availability under credit facility				$ 8,803,000
Number of consecutive days excess availability is above required amount				60 days
London Interbank Offered Rate (LIBOR) | Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Interest rate				2.69%
LIBOR based interest rate, principal				$ 11,700,000
Base Rate | Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Interest rate				3.75%
Prime based rate principal				$ 59,000
Scenario, Forecast | JPMorgan Chase Bank | Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Decrease to the applicable margin	0.25%
Minimum availability required under availability block			$ 2,000,000
Minimum availability required trigger amount (if less than)	$ 3,600,000
Minimum fixed charge coverage ratio						1.0
Number of consecutive days excess availability is above required amount	45 days
Limited security by foreign subsidiaries' capital stock percentage					65.00%
Subsequent Event | JPMorgan Chase Bank | Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 30,000,000
Maximum aggregate principal amount of indebtedness allowed for capital lease obligations	2,000,000
Minimum availability required trigger amount (if less than)	$ 2,400,000
Subsequent Event | London Interbank Offered Rate (LIBOR) | JPMorgan Chase Bank | Revolving Line of Credit Facility
Line of Credit Facility [Line Items]
Applicable margin for LIBOR-based interest rate/ Applicable margin for Alternate base rate	1.50%
AutoMD | Purchase Agreement | Scenario, Forecast
Line of Credit Facility [Line Items]
Common stock issued (in shares) | shares	2,000