Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 29, 2012	Dec. 31, 2011
Consolidated Balance Sheets
Receivables, allowance for doubtful accounts (in dollars)	$ 17,300	$ 15,100
Long-term investments, allowance for losses (in dollars)	$ 2,207,500	$ 883,100
Common Stock
Statement
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	4,996,459	4,987,643
Common stock, shares outstanding	4,996,459	4,987,643