Notes Payable and Long-Term Debt (Narrative) (Details) - USD ($)		6 Months Ended
	Jan. 08, 2021	Mar. 30, 2021	Jul. 01, 2021	May 20, 2020
Cadence Credit Facility [Member]
Debt Instrument [Line Items]
Loan agreement, increase amount		$ 11,000,000
Interest rate		0.25%
Weighted average interest rate		3.75%
Interest rate description		As of March 30, 2021, 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		$ 308,500
Maturity date	Jan. 31, 2023	Jan. 31, 2023
Minimum liquidity amount		$ 2,000,000
Letters of credit outstanding, amount		3,500,000
Letters of credit outstanding face value		157,500
Periodic principal payment amount		250,000
Reduce commitment amount	$ 11,000,000	10,000,000
Cadence Credit Facility [Member] | Subsequent Event[Member]
Debt Instrument [Line Items]
Reduce commitment amount			$ 8,000,000
Paycheck Protection Program [Member] | Cadence Bank, N.A. [Member]
Debt Instrument [Line Items]
Weighted average interest rate				1.00%
Unsecured loan aggregate principal amount		8,100,000		$ 11,645,000
Monthly payments installment		$ 489,000