Consolidated Balance Sheets [Parenthetical] - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts (in dollars)	$ 0	$ 0
Allowance For Returns	1,066,314	912,789
Accumulated depreciation (in dollars)	$ 18,294,592	$ 17,880,096
Common stock, par value (in dollars per share)	$ 0.30	$ 0.30
Common stock, shares authorized	2,000,000	2,000,000
Common stock, shares issued	583,094	583,094
Common stock, shares outstanding	519,600	519,600
Treasury stock, shares	63,494	63,494