Geographic Information (Schedule of Revenue and Long-Lived Assets, by Geographical Areas) (Details) (USD $)	12 Months Ended
	Apr. 26, 2013		Apr. 27, 2012		Apr. 29, 2011
Net Sales	$ 254,320,417		$ 218,502,731		$ 190,464,398
Long-Lived Assets	28,555,742	[1]	22,160,671	[1]	8,203,392	[1]
United States [Member]
Net Sales	210,352,698		182,955,274		162,728,485
Long-Lived Assets	24,515,681	[1]	21,979,396	[1]	8,026,798	[1]
International [Member]
Net Sales	43,967,719	[2]	35,547,457	[2]	27,735,913	[2]
Long-Lived Assets	$ 4,040,061	[1]	$ 181,275	[1]	$ 176,594	[1]

[1] Long-lived assets consist of PP&E. The increase in international assets in fiscal year 2013 is due to the construction of a second manufacturing facility to be located in Costa Rica and the build-out of the new leased offices in Belgium.

[2] Sales are classified according to the country of designation, regardless of the shipping point.