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Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data
Total
Common Stock
Paid-in Capital
Retained Earnings
Noncontrolling Interest
Balance at Dec. 31, 2010 $ 8,182 $ 31 $ 4,702 $ 3,449  
Balance, shares at Dec. 31, 2010   30,604,167      
Issuance of common stock for option exercise 48   48    
Issuance of common stock for option exercise, shares 112,500 112,500      
Issuance of common stock for consulting services 79   79    
Issuance of common stock for consulting services, shares   99,964      
Employee stock-based compensation expense 267   267    
Net income (loss) 1,564     1,564  
Balance at Dec. 31, 2011 10,140 31 5,096 5,013  
Balance, shares at Dec. 31, 2011 30,816,631 30,816,631      
Issuance of common stock for business acquisition 158   158    
Issuance of common stock for business acquisition, shares   266,478      
Issuance of common stock for option exercise 13   13    
Issuance of common stock for option exercise, shares 34,500 34,500      
Issuance of common stock for cashless warrant exercise, shares 5,625 5,625      
Issuance of common stock for consulting services 20   20    
Issuance of common stock for consulting services, shares   25,000      
Employee stock-based compensation expense 166   166 0  
Issuance of noncontrolling interest in ZBC (Note 2) 10       10
Net income (loss) 1,553     1,553 (5)
Balance at Dec. 31, 2012 $ 12,050 $ 31 $ 5,453 $ 6,566 $ 5
Balance, shares at Dec. 31, 2012 31,148,234 31,148,234