SHAREHOLDERS' EQUITY (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended		0 Months Ended	12 Months Ended					1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	May 05, 2005 Rights Plan	Dec. 31, 2013 Rights Plan	Dec. 31, 2013 Rights Plan Series RP preferred stock	Dec. 31, 2013 Rights Plan Minimum	Dec. 31, 2013 ESPP	Dec. 31, 2012 ESPP	May 31, 2004 ESPP Minimum
Shareholders' equity
Purchase price expressed as percentage of fair market value of common stock									85.00%
Number of shares authorized for issuance							2,500,000
Number of shares available for future issuance							713,592
Shares sold	222,062	203,389					222,062	203,389
Weighted average purchase price of shares sold (in dollars per share)							$ 4.35	$ 4.19
Proceeds from shares sold							$ 1.0	$ 0.9
Options exercised during period (in shares)	621,090	628,394
Net proceeds from options exercised during the period	$ 2.8	$ 1.8
Number of preferred share purchase rights distributed for each share of common stock outstanding (in shares)			1
Percentage of common stock to be acquired for rights to become exercisable for the holder, other than the acquirer at 50% of market value						20.00%
Specified percentage of market value at which rights become exercisable for the holder, other than the acquirer who acquires 20% or more of the Company's common stock				50.00%
Percentage of common stock to be acquired by the unapproved party for rights to become exercisable for the shareholders with unexercised rights, other than the unapproved party at a value twice the market value						20.00%
Number of shares that each right entitles the holder to purchase					0.001
Period after which an unapproved third party makes, or announces an intention to make, a tender offer or exchange offer for determination of the exercise price					10 days