Note 8 - Long-Term Investment	3 Months Ended
Jun. 30, 2013
Investments, All Other Investments [Abstract]
Cost-method Investments, Description [Text Block]	NOTE H – LONG-TERM INVESTMENT In September 2012, Nathan’s purchased 351,550 shares of Series A Preferred Stock in a privately-owned corporation for $500,000. Nathan’s investment currently represents a 2.5% equity ownership in the entity and Nathan’s does not have the ability to exercise significant influence over the investee. The shares have voting rights on the same basis as the common shareholders and have certain dividend rights, if declared. Nathan’s accounts for this investment pursuant to the cost method and recognizes dividends distributed by the investee as income to the extent that dividends are distributed from net accumulated earnings of the investee. There were no dividends declared by the investee during the thirteen week period ended June 30, 2013. Each reporting period, management reviews the carrying value of this investment based upon the financial information provided by the investment’s management and considers whether indicators of impairment exist. If an impairment indicator exists, management evaluates the fair value of its investment to determine if an, other-than-temporary impairment in value has occurred. We are required to recognize an impairment on the investment if such impairment is considered to be other-than-temporary. We have performed our evaluation of whether indicators of impairment existed, and determined that an other-than-temporary impairment has occurred and recorded an impairment charge of $400,000 on this investment during the thirteen week period ended June 30, 2013.

Note 8 - Long-Term Investment

3 Months Ended

Jun. 30, 2013

Investments, All Other Investments [Abstract]

Cost-method Investments, Description [Text Block]

NOTE H – LONG-TERM INVESTMENT

In September 2012, Nathan’s purchased 351,550 shares of Series A Preferred Stock in a privately-owned corporation for $500,000. Nathan’s investment currently represents a 2.5% equity ownership in the entity and Nathan’s does not have the ability to exercise significant influence over the investee. The shares have voting rights on the same basis as the common shareholders and have certain dividend rights, if declared. Nathan’s accounts for this investment pursuant to the cost method and recognizes dividends distributed by the investee as income to the extent that dividends are distributed from net accumulated earnings of the investee. There were no dividends declared by the investee during the thirteen week period ended June 30, 2013. Each reporting period, management reviews the carrying value of this investment based upon the financial information provided by the investment’s management and considers whether indicators of impairment exist. If an impairment indicator exists, management evaluates the fair value of its investment to determine if an, other-than-temporary impairment in value has occurred. We are required to recognize an impairment on the investment if such impairment is considered to be other-than-temporary. We have performed our evaluation of whether indicators of impairment existed, and determined that an other-than-temporary impairment has occurred and recorded an impairment charge of $400,000 on this investment during the thirteen week period ended June 30, 2013.