Note 3 - Fair Value Measurements (Details) (USD $)	3 Months Ended				3 Months Ended
	Jun. 30, 2013	Jun. 24, 2012	Mar. 31, 2013	Sep. 23, 2012	Mar. 31, 2013 Privately-Owned Company [Member]
Note 3 - Fair Value Measurements (Details) [Line Items]
Cost Method Investment Ownership Percentage	2.50%			2.50%
Long-term Investments	$ 100,000		$ 500,000	$ 500,000
Assets	55,640,000		49,662,000		2,426,000
Stockholders' Equity Attributable to Parent	38,882,000		34,148,000		1,817,000
Revenues	23,401,000	20,182,000			616,000
Net Income (Loss) Attributable to Parent	$ 3,354,000	$ 2,006,000			$ 528,000