CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
CURRENT ASSETS:
Accounts receivable, allowance for doubtful accounts	$ 30,000	$ 35,000
STOCKHOLDERS' EQUITY:
Preferred stock - shares authorized (in shares)	10,000,000	10,000,000
Preferred stock - shares outstanding (in shares)	0	0
Common stock - par value (in dollars per share)	$ 0.01	$ 0.01
Common stock - shares authorized (in shares)	100,000,000	100,000,000
Common stock - shares issued (in shares)	63,368,096	62,238,983
Common stock - shares outstanding (in shares)	63,368,096	62,238,983