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EQUITY Directors and Officers (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Equity [Abstract]      
Options granted to director of a subsidiary 25,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period - related parties 201,095 [1] 211,898 141,666
Weighted average exercise price of options granted - related parties $ 5.98 $ 8.02 $ 4.51
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercised in Period - related parties 30,316 199,697 159,779
Weighted average exercise price of options exercised - related parties $ 3.30 $ 3.12 $ 2.64
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period - related parties 125,518 127,803 351,221
Weighted average exercise price of options forfeited - related parties $ 4.11 $ 5.75 $ 3.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Held at end of the Period - related parties 1,179,658 1,134,397 1,199,999
Weighted average exercise price of options held - related parties $ 5.30 $ 4.95 $ 4.13
[1] Includes 25,000 options granted to a director of USSI.