CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Accounts receivable, allowance for sales returns and doubtful accounts	$ 336,000	$ 237,000
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,500,000	1,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	15,450,185	15,431,101
Common stock, shares outstanding	15,450,185	15,431,101
Common stock in treasury, shares	958,908	368,908