Unaudited Quarterly Results (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May 03, 2014	Feb. 01, 2014	Nov. 02, 2013	Aug. 03, 2013	May 04, 2013	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Unaudited Quarterly Results
Net Revenues	$ 7,538us-gaap_RoyaltyRevenue	$ 8,706us-gaap_RoyaltyRevenue	$ 8,764us-gaap_RoyaltyRevenue	$ 9,960us-gaap_RoyaltyRevenue	$ 6,382us-gaap_RoyaltyRevenue	$ 6,684us-gaap_RoyaltyRevenue	$ 7,495us-gaap_RoyaltyRevenue	$ 8,053us-gaap_RoyaltyRevenue	$ 34,968us-gaap_RoyaltyRevenue	$ 28,614us-gaap_RoyaltyRevenue	$ 26,558us-gaap_RoyaltyRevenue
Income before income taxes	2,501	3,607	3,501	4,925	1,280	2,504	3,147	2,540	14,534	9,471	10,872
Net income	$ 1,661	$ 2,316	$ 2,252	$ 3,592	$ 951	$ 1,563	$ 1,938	$ 1,622	$ 9,820	$ 6,074	$ 6,833
Net income per share - basic	$ 0.20us-gaap_EarningsPerShareBasic	$ 0.27us-gaap_EarningsPerShareBasic	$ 0.27us-gaap_EarningsPerShareBasic	$ 0.43us-gaap_EarningsPerShareBasic	$ 0.11us-gaap_EarningsPerShareBasic	$ 0.19us-gaap_EarningsPerShareBasic	$ 0.23us-gaap_EarningsPerShareBasic	$ 0.19us-gaap_EarningsPerShareBasic	$ 1.17us-gaap_EarningsPerShareBasic	$ 0.72us-gaap_EarningsPerShareBasic	$ 0.81us-gaap_EarningsPerShareBasic
Net income per share - diluted	$ 0.19us-gaap_EarningsPerShareDiluted	$ 0.27us-gaap_EarningsPerShareDiluted	$ 0.27us-gaap_EarningsPerShareDiluted	$ 0.43us-gaap_EarningsPerShareDiluted	$ 0.11us-gaap_EarningsPerShareDiluted	$ 0.19us-gaap_EarningsPerShareDiluted	$ 0.23us-gaap_EarningsPerShareDiluted	$ 0.19us-gaap_EarningsPerShareDiluted	$ 1.15us-gaap_EarningsPerShareDiluted	$ 0.72us-gaap_EarningsPerShareDiluted	$ 0.81us-gaap_EarningsPerShareDiluted

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights.

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