Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ (513,000)	$ (972,000)	$ (503,000)
State	(155,000)	(378,000)	(182,000)
Current income tax expense (benefit)	(668,000)	(1,350,000)	(685,000)
Deferred:
Federal	34,000	423,000	623,000
State	2,000	85,000	100,000
Deferred income taxes	36,000	508,000	723,000
Total
Total income tax (expense) benefit	$ (632,000)	$ (842,000)	$ 38,000
Reconciliation of the effective income tax rate with the applicable statutory federal income tax rate
Federal tax at statutory rate (as a percent)	34.00%	34.00%	34.00%
State taxes, net of federal benefit (as a percent)	6.00%	6.00%	(3.70%)
Non-deductible stock based compensation (as a percent)	8.40%	6.30%	(24.80%)
Federal tax credit for payroll tax on employee tips	(4.70%)	(14.60%)
Other (as a percent)	0.90%	(0.70%)	(0.40%)
Effective income tax rate (as a percent)	44.60%	31.00%	5.10%
Deferred income tax assets:
Point loyalty program	$ 656,000	$ 660,000
Accrued expenses	4,077,000	3,901,000
Net operating loss carry-forwards		91,000
Federal tax credit for payroll tax on employee tips	96,000	132,000
Other	236,000	297,000
Total deferred income tax assets	5,065,000	5,081,000
Valuation allowance		(91,000)
Net deferred income tax assets	5,065,000	4,990,000
Deferred income tax liabilities:
Depreciation - property and equipment	(3,045,000)	(3,200,000)
Total deferred income tax liabilities	(3,045,000)	(3,200,000)
Net deferred income tax assets	2,020,000	1,790,000
Amounts recognized in the consolidated balance sheet:
Current deferred income tax assets		1,308,000
Noncurrent deferred income tax assets	2,020,000	482,000
Net deferred income tax assets	$ 2,020,000	$ 1,790,000