Note 8 - Stock Repurchase (Details Textual) - USD ($)		9 Months Ended
	Jul. 01, 2016	Dec. 31, 2016	Mar. 31, 2016
Common Stock, Par or Stated Value Per Share		$ 0.25	$ 0.25
Stock Repurchased and Retired During Period, Value		$ 7,917,009
Securities Purchase Agreement [Member] | Biglari Group [Member]
Stock Repurchased and Retired During Period, Shares	329,738
Common Stock, Par or Stated Value Per Share	$ 0.25
Treasury Stock Acquired, Average Cost Per Share	$ 24.01
Stock Repurchased and Retired During Period, Value	$ 7,917,009