Borrowings (Details) - USD ($)		9 Months Ended
	Oct. 27, 2015	Sep. 30, 2015
Borrowings
Foreign borrowings that were subject to the bank's dominion		$ 600,000
Wells Fargo Bank, N.A. | ABL Facility
Borrowings
Maximum borrowing capacity		60,000,000
Current borrowing base		50,300,000
Amount outstanding		$ 30,000,000
Maximum percent available for borrowing for initial 12-month fixed charge coverage ratio (percent)		25.00%
Maximum amount available for borrowing for initial 12-month fixed charge coverage ratio		$ 15,000,000
Minimum percent available for borrowing for continuing compliance with 12-month fixed charge coverage ratio (percent)		25.00%
Minimum amount available for borrowing for continuing compliance with 12-month fixed charge coverage ratio		$ 15,000,000
Continuing compliance requirement for 12-month fixed charge coverage ratio (days)		30 days
Maximum percent available for borrowing for lender dominion over U.S. cash and cash receipts for 5 consecutive days (percent)		30.00%
Maximum amount available for borrowing for lender dominion over U.S. cash and cash receipts for 5 consecutive days		$ 18,000,000
Maximum percent available for borrowing for lender dominion over U.S. cash and cash receipts (percent)		25.00%
Maximum amount available for borrowing for lender dominion over U.S. cash and cash receipts		$ 15,000,000
Minimum percent available for borrowing for lender dominion over U.S. cash and cash receipts for continuing compliance		30.00%
Minimum amount available for borrowing for lender dominion over U.S. cash and cash receipts for continuing compliance		$ 18,000,000
Continuing compliance period requirement for lender dominion over U.S. cash and cash receipts (days)		30 days
Subsequent Event | Wells Fargo Bank, N.A. | ABL Facility
Borrowings
Minimum amount of excess availability for trigger date to occur	$ 10,000,000
Percent of commitments for trigger date to occur (percent)	16.666%
Minimum amount of excess availability for trigger date to occur, continuing compliance	$ 10,000,000
Percent of commitments for trigger date to occur, continuing compliance (percent)	16.666%
Continuing compliance period requirement for trigger date (days)	30 days