Weighted Average Option Rollforward - (Details) - USD ($)	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward
Exercised	8,051	0	500
Employee Stock Options [Member] | Class A Common Stock
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward
Options Outstanding	500
Exercised	(8,051)
Options Outstanding		500
Weighted Average Remaining Contractual Term for Vested and Exercisable Options	8 months 12 days
Weighted Average Contractual Term for Options Outstanding	8 months 12 days	9 years 4 months 24 days
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Rollforward
Options Outstanding	$ 14.17
Options Outstanding		$ 14.17
Employee Stock Options [Member] | Convertible Class B Common Stock
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward
Options Outstanding	20,127
Granted	0
Forfeited of expired	0
Options Outstanding	12,076	20,127
Weighted Average Remaining Contractual Term for Vested and Exercisable Options	0 years
Weighted Average Contractual Term for Options Outstanding	9 years 3 months 18 days	0 years
Intrinsic Value for Options Outstanding	$ 179,449	$ 195,433
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Rollforward
Options Outstanding	$ 23.56
Options Outstanding	$ 23.56	$ 23.56