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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Sep. 30, 2018   37,961,000      
Beginning Balance at Sep. 30, 2018 $ 95,394 $ 38 $ 116,944 $ (21,002) $ (586)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options (in shares)   135,000      
Exercise of stock options 586   586    
Settlement of restricted stock units (in shares)   543,000      
Settlement of restricted stock units 0 $ 1 (1)    
Stock-based compensation expense 2,670   2,670    
Other comprehensive income (loss)          
Net income (loss) (3,191)     (3,191)  
Foreign currency translation adjustment (824)       (824)
Unrealized gain on investments 13       13
Other comprehensive income (loss) (4,002)        
Ending Balance (in shares) at Dec. 31, 2018   38,639,000      
Ending Balance at Dec. 31, 2018 $ 95,568 $ 39 120,199 (23,273) (1,397)
Beginning Balance (in shares) at Sep. 30, 2019 40,367,456 40,367,000      
Beginning Balance at Sep. 30, 2019 $ 107,333 $ 40 132,160 (20,806) (4,061)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options (in shares) 23,318 24,000      
Exercise of stock options $ 73   73    
Settlement of restricted stock units (in shares)   474,000      
Settlement of restricted stock units 0 $ 1 (1)    
Stock-based compensation expense 2,303   2,303    
Other comprehensive income (loss)          
Net income (loss) 560     560  
Foreign currency translation adjustment 1,253       1,253
Unrealized gain on investments 2       2
Other comprehensive income (loss) $ 1,815        
Ending Balance (in shares) at Dec. 31, 2019 40,864,686 40,865,000      
Ending Balance at Dec. 31, 2019 $ 111,524 $ 41 $ 134,535 $ (20,246) $ (2,806)