Risk Management (Details) - USD ($)	Jul. 01, 2017	Dec. 31, 2017
RISK MANAGEMENT
Self insurance retention per occurrence	$ 350,000
Aggregate coverage	$ 707,898
Retention limit in excess of claims paid and accrued		$ 569,000
Estimated additional future claims		116,000
Cash collateral and escrow held by insurance carrier for workers' compensation insurance		$ 300,000