CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Accounts receivable, allowance for doubtful accounts	$ 453,800	$ 452,000
Intangible assets, accumulated amortization	7,124,593	6,864,657
Other assets, inventory	$ 481,135	$ 407,615
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	1,000,000	1,000,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	20,000,000	20,000,000
Common stock, issued	9,631,603	9,618,083
Treasury stock, shares	48,573	48,573