Significant transactions (Details 3) (USD $)	12 Months Ended		0 Months Ended		12 Months Ended	0 Months Ended			0 Months Ended								0 Months Ended						0 Months Ended				1 Months Ended
Significant transactions (Details 3) (USD $)	Dec. 31, 2013 restaurant	Dec. 31, 2013 Interest Rate Swap	Dec. 04, 2013 Credit agreement with Bank fiscalquarter	Dec. 04, 2013 Credit agreement with Bank Interest Rate Swap	Dec. 31, 2013 Credit agreement with Bank Interest Rate Swap	Dec. 04, 2013 Credit agreement with Bank Maximum	Dec. 04, 2013 Credit agreement with Bank Minimum	Dec. 04, 2013 Credit agreement with Bank Dunham Capital Management L.L.C. restaurant	Sep. 30, 2013 Term loan	Dec. 31, 2013 Term loan	Dec. 04, 2013 Term loan	May 31, 2013 Term loan	Dec. 25, 2012 Term loan	Mar. 11, 2014 Term loan Subsequent event	Dec. 31, 2013 Term loan Maximum	Dec. 31, 2013 Term loan Minimum	Dec. 04, 2013 CapEx line	May 31, 2013 CapEx line	Dec. 25, 2012 CapEx line	Dec. 04, 2013 CapEx line Maximum	Mar. 11, 2014 CapEx line Maximum Subsequent event	Dec. 04, 2013 Standby letters of credit	Dec. 04, 2013 DDTL	Dec. 31, 2013 DDTL	May 31, 2013 DDTL	Mar. 11, 2014 DDTL Subsequent event	Dec. 31, 2013 DDTL Dunham Capital Management L.L.C.
Credit agreement
Term loan under the amended and restated agreement											$ 16,000,000	$ 16,000,000													$ 3,700,000
Maximum borrowing capacity for the period from December 4, 2013 until December 31, 2014																	13,000,000
Maximum borrowing capacity thereafter																	10,000,000
Maximum borrowing capacity																		13,000,000				100,000	4,000,000
Number of restaurant properties	30							6
Amount of debt used to acquired restaurant properties																											3,700,000
Waiver of requirement to pay down debt using net proceeds received from the issuance of Redeemable Preferred Stock (as a percent)											25.00%
Threshold aggregate principal amount of loans outstanding above which prepayment of debt will be required																				2,500,000
Variable interest rate basis			LIBOR	one-month LIBOR
Fixed interest rate (as a percent)				1.02%						5.50%	6.75%		6.75%		5.77%	5.50%			6.75%					5.50%
First period for LIBOR loans that interest is payable			30 days
Second period for LIBOR loans that interest is payable			60 days
Third period for LIBOR loans that interest is payable			90 days
Commitment fee as a percentage of the unused line																	0.50%						0.50%
Principal payments in quarterly installments through June 30, 2014									200,000
Principal payments in quarterly installments through June 30, 2015									300,000
Principal payments in each quarter after June 30, 2015									400,000
Periodic payment in quarterly installments as a percentage of outstanding principal through September 30, 2014																							1.25%
Periodic payment in quarterly installments as a percentage of outstanding principal on and after December 31, 2014																							1.875%
Periodic payment in quarterly installments as a percentage of outstanding principal on and after December 31, 2015																							2.50%
Portion of net cash proceeds received from issuance of equity securities used to prepay loans (as a percent)			25.00%
Portion of net cash proceeds received from borrowings used to prepay loans (as a percent)			100.00%
Leverage ratio						4.50
Senior leverage ratio, maximum			3.30
Senior leverage ratio for the quarter ending March 31, 2017, minimum			2.50
Number of fiscal quarters attributable to all restaurant locations			4
Minimum fixed charge coverage ratio attributable to all restaurant locations			1.20
Period for which restaurant locations open							12 months
Number of fiscal quarters attributable to restaurant locations that have been open for more than twelve (12) months			4
Minimum fixed charge coverage ratio attributable to restaurant locations that have been open for more than twelve (12) months			1.25
Capital expenditures, other than capital expenditures financed with the proceeds of the CapEx line			15,000,000
Capital expenditures carryovers						2,500,000
Debt amount	20,886,474	12,000,000		12,000,000						15,600,000			8,107,852	15,600,000					8,000,000		2,500,000			3,700,701		3,700,000
Interest rate swap agreement period				3 years
Notional amount of interest rate swap agreement				12,000,000
Effective interest rate (as a percent)		5.77%		5.77%
Change in fair value of interest rate swap	$ 128,557				$ 128,557

GRANITE CITY FOOD & BREWERY LTD. 10-K