Accrued Liabilities: (Details) - USD ($)	Dec. 30, 2017	Dec. 31, 2016
Accrued Liabilities
Accrued compensation and benefits	$ 970,200	$ 1,011,900
Deferred rent	241,400	234,000
Accrued interest	357,100	253,500
Other	268,600	311,700
Accrued liabilities	$ 1,837,300	$ 1,811,100