Annual report pursuant to Section 13 and 15(d)

Quarterly Results - Summary of Quarterly Financial Data (Detail)

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Quarterly Results - Summary of Quarterly Financial Data (Detail) (USD $)
3 Months Ended 12 Months Ended
Nov. 30, 2012
Aug. 31, 2012
May 31, 2012
Feb. 29, 2012
Nov. 30, 2011
Aug. 31, 2011
May 31, 2011
Feb. 28, 2011
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Quarterly Financial Information [Line Items]                      
Net Sales $ 11,265,592 $ 13,775,461 $ 14,596,899 $ 13,531,070 $ 11,710,738 $ 12,113,942 $ 12,797,773 $ 12,410,914 $ 53,169,022 $ 49,033,367 $ 50,345,213
Total Revenue 11,373,749 14,003,207 14,710,472 13,688,247 11,826,482 12,228,988 12,885,313 12,571,106 53,775,675 49,511,889 50,811,642
Cost of Products Sold 5,155,421 5,736,175 6,319,109 6,008,346 5,601,210 5,130,071 4,988,813 4,730,374 23,219,051 20,450,468 21,808,009
Gross Profit 6,110,171 8,039,286 8,277,790 7,522,724 6,109,528 6,983,871 7,808,960 7,680,540      
Net Income (Loss) $ (352,929) $ 428,747 $ 302,100 $ 87,534 $ (3,433) $ 399,294 $ (247,268) $ 343,105 $ 465,452 $ 491,698 $ (1,664,760)
Earnings (Loss) Per Share:                      
Basic $ (0.05) $ 0.06 $ 0.04 $ 0.01 $ 0.00 $ 0.06 $ (0.04) $ 0.05 $ 0.07 $ 0.07 $ (0.24)
Diluted $ (0.05) $ 0.06 $ 0.04 $ 0.01 $ 0.00 $ 0.06 $ (0.04) $ 0.05 $ 0.07 $ 0.07 $ (0.24)