ORGANIZATION AND ACCOUNTING POLICIES (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011
Accounts Receivable
Credit period	30 days
Allowance of for doubtful accounts	$ 16,000	$ 13,000
Investments
Number of categories of investment in debt securities	2
Offering Costs
Deferred finance costs, net of accumulated amortization	1,600,000	1,500,000
Accumulated amortization of debt issuance costs	802,000	584,000
Stockholders' equity
Compensation expense related to stock options and restricted stock awards	$ 2,100,000	$ 2,600,000	$ 1,500,000
Stock options
Stockholders' equity
Expected dividends rate (as a percent)	0.00%	0.00%	0.00%
Weighted-average assumptions used to value stock options
Weighted average volatility (as a percent)	71.00%	72.00%	75.00%
Risk-free interest rate (as a percent)	0.53%	0.43%	1.26%
Expected life	3 years 6 months	3 years 6 months	3 years 6 months
Weighted average fair value (in dollars per share)	$ 1.43	$ 1.41	$ 2.04