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Consolidated Statements of Stockholders' Equity - USD ($)
Total
Common Stock [Member]
Common Stock [Member]
IDchecker [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Sep. 30, 2013 $ 25,729,000 $ 30,000   $ 56,432,000 $ (30,735,000) $ 2,000
Beginning Balance, shares at Sep. 30, 2013   30,361,442        
Exercise of stock options $ 119,000 $ 1,000   118,000    
Exercise of stock options, shares 108,135 105,280        
Settlement of restricted stock units $ (48,000)     (48,000)    
Settlement of restricted stock units, shares   54,358        
Stock-based compensation expense 3,444,000     3,444,000    
Components of other comprehensive income:            
Net income (loss) (5,292,000)       (5,292,000)  
Currency translation adjustment 0          
Change in unrealized gain (loss) on investments (10,000)         (10,000)
Other comprehensive income (loss) (5,302,000)          
Ending Balance at Sep. 30, 2014 23,942,000 $ 31,000   59,946,000 (36,027,000) (8,000)
Ending Balance, shares at Sep. 30, 2014   30,521,080        
Exercise of stock options $ 246,000     246,000    
Exercise of stock options, shares 232,203 232,203        
Settlement of restricted stock units, shares   255,041        
Acquisition-related closing shares $ 347,000 $ 1,000   346,000    
Acquisition-related closing shares, shares   712,790        
Stock-based compensation expense 3,367,000     3,367,000    
Components of other comprehensive income:            
Net income (loss) 2,526,000       2,526,000  
Currency translation adjustment 0          
Change in unrealized gain (loss) on investments 5,000         5,000
Other comprehensive income (loss) 2,531,000          
Ending Balance at Sep. 30, 2015 $ 30,433,000 $ 32,000   63,905,000 (33,501,000) (3,000)
Ending Balance, shares at Sep. 30, 2015 31,721,114 31,721,114        
Exercise of stock options $ 1,755,000 $ 1,000   1,754,000    
Exercise of stock options, shares 661,663 661,663        
Settlement of restricted stock units, shares   261,621        
Acquisition-related closing shares, shares     137,306      
Stock-based compensation expense $ 4,079,000     4,079,000    
Amortization of closing shares 1,298,000     1,298,000    
Components of other comprehensive income:            
Net income (loss) 1,959,000       1,959,000  
Currency translation adjustment (46,000)         (46,000)
Change in unrealized gain (loss) on investments 7,000         7,000
Other comprehensive income (loss) 1,920,000          
Ending Balance at Sep. 30, 2016 $ 39,485,000 $ 33,000   $ 71,036,000 $ (31,542,000) $ (42,000)
Ending Balance, shares at Sep. 30, 2016 32,781,704 32,781,704