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EQUITY General (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 0 Months Ended 3 Months Ended 12 Months Ended
Feb. 27, 2013
Nov. 01, 2012
Jan. 17, 2012
Oct. 05, 2011
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Jun. 10, 2010
Class of Stock [Line Items]                              
Common stock, shares authorized           30,000,000         30,000,000 30,000,000   30,000,000 20,000,000
Common Stock, Shares, Outstanding                     22,155,939        
Stock Issued During Period, Shares, Dividend Reinvestment Plan         18,976 14,305 8,429 0 0 0 18,976 22,734 0    
Expiring DSIT warrants                       10.00%      
USSI options granted                     50,000 637,375      
USSI options exercise price per share                     $ 1.72 $ 1.72      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year   1 year 90 days                      
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions             93.60%                
Fully diluted ownership   85.10%                          
Common Stock, Par or Stated Value Per Share           $ 0.01         $ 0.01 $ 0.01      
Conversion of Stock, Shares Issued                     2,954 36,502      
Warrants forfeited in cashless exercise                     2,796 15,248      
Conversion of Stock, Shares Converted                     5,750 51,750      
Weighted average exercise price - cashless exercise                     $ 3.68 $ 3.68      
USSI Stock Option Plan [Member]
                              
Class of Stock [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           1,180,000           1,180,000      
USSI options granted                     50,000 637,375      
USSI options exercise price per share                       $ 1.72      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable Period                       7 years      
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions                     95.70%        
Fully diluted ownership                     88.40%        
Total share based compensation USSI subsidiary                     $ 133 $ 323      
Share based compensation USSI subsidiary - in General and Administrative Expense                     $ 92 $ 243      
USSI Stock Option Plan [Member] | Minimum [Member]
                              
Class of Stock [Line Items]                              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                       3 years