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Consolidated Statements of Changes in Stockholders' Equity (USD $)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Balance at Dec. 31, 2011 $ 1,301,800 $ 446 $ 42,462,554 $ (41,161,200)
Balance (in shares) at Dec. 31, 2011   4,455,790    
Net income (loss) 3,886,905 0 0 3,886,905
Stock-based compensation 127,488 0 127,488 0
Balance at Dec. 31, 2012 5,316,193 446 42,590,042 (37,274,295)
Balance (in shares) at Dec. 31, 2012   4,455,790    
Net income (loss) (10,590,106) 0 0 (10,590,106)
Stock-based compensation 979,151 0 979,151 0
Option exercises 10,575 0 10,575 0
Option exercises (in shares) 3,761 3,761    
Vesting of restricted stock awards 0 1 (1) 0
Vesting of restricted stock awards (in shares)   7,763    
Repurchase and retirement of common stock (53,100) (1) (53,099) 0
Repurchase and retirement of common stock (in shares)   (8,626)    
Issuance of common stock in private offering 35,709,645 634 35,709,011 0
Issuance of common stock in private offering (in shares)   6,336,664    
Issuance of common stock in offering 12,537,943 172 12,537,771 0
Issuance of common stock in offering (in shares)   1,715,800    
Common stock issued in reverse merger   5,000    
Issuance of common stock for termination of certain rights in stock purchase agreement 913,446 15 913,431 0
Issuance of common stock for termination of certain rights in stock purchase agreement (in shares)   152,241    
Balance at Dec. 31, 2013 $ 44,823,747 $ 1,267 $ 92,686,881 $ (47,864,401)
Balance (in shares) at Dec. 31, 2013   12,668,393