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Consolidated Statements of Stockholders' Equity - USD ($)
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Sep. 30, 2012 $ 13,556,679 $ 25,995 $ 36,990,691 $ (23,459,391) $ (616)
Beginning Balance, shares at Sep. 30, 2012   25,995,216      
Issuance of common stock, net of issuance costs 16,004,797 $ 3,286 16,001,511    
Issuance of common stock, shares   3,285,713      
Exercise of stock options $ 714,469 $ 1,043 713,426    
Exercise of stock options, shares 1,103,582 1,042,872      
Settlement of restricted stock units $ (65,813) $ 37 (65,850)    
Settlement of restricted stock units, shares   37,641      
Stock-based compensation expense 2,791,862   2,791,862    
Components of other comprehensive income:          
Net income (loss) (7,275,706)     (7,275,706)  
Change in unrealized gain (loss) on investments 2,454       2,454
Other comprehensive income (loss) (7,273,252)        
Ending Balance at Sep. 30, 2013 25,728,742 $ 30,361 56,431,640 (30,735,097) 1,838
Ending Balance, shares at Sep. 30, 2013   30,361,442      
Exercise of stock options $ 118,754 $ 105 118,649    
Exercise of stock options, shares 108,135 105,280      
Settlement of restricted stock units $ (48,426) $ 55 (48,481)    
Settlement of restricted stock units, shares   54,358      
Stock-based compensation expense 3,444,480   3,444,480    
Components of other comprehensive income:          
Net income (loss) (5,291,869)     (5,291,869)  
Foreign currency translation adjustment 0        
Change in unrealized gain (loss) on investments (9,648)       (9,648)
Other comprehensive income (loss) (5,301,517)        
Ending Balance at Sep. 30, 2014 $ 23,942,033 $ 30,521 59,946,288 (36,026,966) (7,810)
Ending Balance, shares at Sep. 30, 2014 30,521,080 30,521,080      
Exercise of stock options $ 246,644 $ 232 246,412    
Exercise of stock options, shares 232,203 232,203      
Settlement of restricted stock units   $ 255 (255)    
Settlement of restricted stock units, shares   255,041      
Acquisition-related closing shares $ 346,241 $ 713 345,528    
Acquisition-related closing shares, shares   712,790      
Stock-based compensation expense 3,367,486   3,367,486    
Components of other comprehensive income:          
Net income (loss) 2,526,139     2,526,139  
Foreign currency translation adjustment (318)       (318)
Change in unrealized gain (loss) on investments 4,887       4,887
Other comprehensive income (loss) 2,530,708        
Ending Balance at Sep. 30, 2015 $ 30,433,112 $ 31,721 $ 63,905,459 $ (33,500,827) $ (3,241)
Ending Balance, shares at Sep. 30, 2015 31,721,114 31,721,114