Notes Payable and Long-Term Debt (Details) - Cadence Credit Facility [Member]		3 Months Ended
	Sep. 11, 2017 USD ($)	Dec. 25, 2018 USD ($)	Sep. 08, 2018 USD ($)
Debt Instrument [Line Items]
Loan Agreement, amount			$ 9,000,000
Loan agreement, increase amount	$ 12,000,000	$ 17,000,000
Interest rate		0.25%
Weighted average interest rate		5.8893%
Interest rate description		All borrowings under the Cadence Credit Facility, as amended, bear interest at a variable rate based upon the Company's election of (i) 2.5% 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 0.250% floor, plus 3.5%. 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		$ 232,000
Maturity date	Dec. 31, 2020	Dec. 31, 2021
Minimum liquidity amount		$ 2,000,000
Letters of credit outstanding, amount		$ 10,200,000
Debt incurrence test on new borrowings		0.25
Letters of credit outstanding face value		$ 157,500