Note 6 - Long-term Debt and Capital Leases (Details Textual) $ in Thousands			3 Months Ended
	May 26, 2017 USD ($)	May 14, 2012 USD ($)	Sep. 05, 2017 USD ($)	Jun. 06, 2017 USD ($)	May 25, 2017 USD ($)	Feb. 28, 2017 USD ($)
Debt Instrument, Collateral Amount, Appraised Value						$ 31,000
Secured Debt			$ 4,280	$ 4,650
Senior Credit Facility [Member]
Debt Instrument, Term	364 days
Line of Credit Facility, Maximum Borrowing Capacity	$ 20,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.50%
Number of Restaurants Collateralizing Debt	22
Debt Instrument, Collateral Amount			34,700
Short-term Debt			0
Line of Credit Facility, Remaining Borrowing Capacity			8,000
Debt Instrument, Covenant Requirements, Minimum Appraised Value of Eligible Restaurants			$ 30,000
Line of Credit Facility, Maximum Leverage Ratio			5
Debt Instrument, Maturity Date			May 25, 2018
Senior Credit Facility [Member] \| Federal Funds Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Senior Credit Facility [Member] \| Adjusted London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Senior Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	4.00%
Senior Credit Facility [Member] \| Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	3.00%
Senior Credit Facility [Member] \| Sub-limit for Standby Letters of Credit [Member]
Line of Credit Facility, Current Borrowing Capacity	$ 15,000
Prior Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity					$ 30,000
Rent and Other Line Item [Member]
Interest Payable, Current			$ 5,200	1,200
Senior Notes [Member]
Debt Instrument, Face Amount		$ 250,000
Debt Instrument, Interest Rate, Stated Percentage		7.625%
Debt Instrument, Unamortized Discount		$ 3,700	1,262	$ 1,366
Debt Instrument, Term		8 years
Debt Instrument Repurchased Amount Authorized			20,000
Debt Instrument, Repurchase Amount			$ 0
Debt Instrument, Maturity Date			May 15, 2020
Debt Instrument, Cumulative Sinking Fund Payments			$ 0
Mortgages [Member]
Secured Debt			4,300
Mortgages [Member] \| Minimum [Member]
Range of Loan Balances			$ 400
Debt Instrument, Interest Rate, Effective Percentage			7.78%
Mortgages [Member] \| Maximum [Member]
Range of Loan Balances			$ 700
Debt Instrument, Interest Rate, Effective Percentage			10.17%

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