Debt and Capital Leases (Narrative) (Details) - USD ($)		12 Months Ended
	Sep. 11, 2017	Sep. 26, 2017	Sep. 27, 2016
Debt Instrument [Line Items]
Interest expense		$ 191,000	$ 126,000
Cadence Credit Facility [Member]
Debt Instrument [Line Items]
Loan Agreement, amount		9,000,000
Loan Agreement, amount outstanding		$ 5,300,000
Loan agreement, increase amount	$ 12,000,000
Interest rate		0.25%
Weighted average interest rate		5.2375%
Interest rate description		All borrowings under the Cadence Credit Facility bear interest at a variable rate based upon the Company’s election of (i) 3.0% plus the base rate, which is the highest of the (a) Federal Funds Rate plus 0.5%, (b) the Cadence bank publicly-announced prime rate, and (c) LIBOR plus 1.0%, or (ii) LIBOR, with a 0.125% floor, plus 4.0%. Interest is due at the end of each calendar quarter if the Company selects to pay interest based on the base rate and at the end of each LIBOR period if it selects to pay interest based on LIBOR.
Payment of debt issuance costs		$ 197,000
Maturity date	Dec. 31, 2020