Annual report pursuant to section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

v2.4.0.6
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Accounts Receivable and Allowance for Doubtful Accounts [Abstract]      
Increase in allowance for doubtful accounts $ 0 $ 55,000 [1] $ 29,000 [1]
Accounts receivable written off 0 0 0
Contractual Based Intangible Assets [Abstract]      
Lease remaining amortization period 17 months 29 months  
Expected amortization expense 2013 250,000    
Expected amortization expense 2014 100,000    
Retirement plan [Abstract]      
Percentage contribution by employer in relation to employee contribution to fund (in hundredths) 100.00%    
Employer matching contribution (in hundredths) 6.00%    
Vesting period under 401(k) plan 7 years    
Matching contribution by employer 518,000 472,000 457,000
Other Liabilities [Abstract]      
Reduction in depreciation expense due to amortization of capitalize liability 1,102,000 210,000 [1] 551,000 [1]
Income Taxes [Abstract]      
Accrued interest related to uncertain tax positions $ 0 $ 0  
Minimum [Member]
     
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Imputed interest rates on outstanding notes (in hundredths)   8.00% 8.00%
Maximum [Member]
     
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Imputed interest rates on outstanding notes (in hundredths)   9.00% 9.00%
[1] Restated - See Note 2