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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Accumulated Deficit
Other Comprehensive Income (Loss)
Retrospective adoption of Topic 606 $ 1,502       $ 1,502  
Beginning balance (in shares) at Dec. 31, 2017   12,492,000        
Beginning balance at Dec. 31, 2017 63,774 $ 129 $ (5,017) $ 346,322 (277,597) $ (63)
Stock issued upon acquisition, net of offering costs (in shares)   92,000        
Stock issued upon acquisition, net of offering costs 1,125 $ 1   1,124    
Share based compensation 194     194    
Net loss (1,925)       (1,925)  
Other comprehensive income (loss) 3         3
Ending balance (in shares) at Mar. 31, 2018   12,584,000        
Ending balance at Mar. 31, 2018 64,673 $ 130 (5,017) 347,640 (278,020) (60)
Beginning balance (in shares) at Dec. 31, 2017   12,492,000        
Beginning balance at Dec. 31, 2017 63,774 $ 129 (5,017) 346,322 (277,597) (63)
Net loss (9,277)          
Ending balance (in shares) at Sep. 30, 2018   15,224,000        
Ending balance at Sep. 30, 2018 99,792 $ 156 (5,017) 390,834 (285,372) (809)
Beginning balance (in shares) at Mar. 31, 2018   12,584,000        
Beginning balance at Mar. 31, 2018 64,673 $ 130 (5,017) 347,640 (278,020) (60)
Share based compensation 329     329    
Net loss (3,768)       (3,768)  
Other comprehensive income (loss) (437)         (437)
Stock issued, net of issuance costs (in shares)   2,390,000        
Stock issued, net of issuance costs 39,150 $ 24   39,126    
Stock issued upon option exercise and vesting of restricted stock units (in shares)   24,000        
Stock issued upon option exercise and vesting of restricted stock units 139     139    
Ending balance (in shares) at Jun. 30, 2018   14,998,000        
Ending balance at Jun. 30, 2018 100,086 $ 154 (5,017) 387,234 (281,788) (497)
Share based compensation 363     363    
Net loss (3,584)       (3,584)  
Other comprehensive income (loss) (312)         (312)
Stock issued, net of issuance costs (in shares)   224,000        
Stock issued, net of issuance costs $ 3,223 $ 2   3,221    
Stock issued upon option exercise and vesting of restricted stock units (in shares) 2,000 2,000        
Stock issued upon option exercise and vesting of restricted stock units $ 16     16    
Ending balance (in shares) at Sep. 30, 2018   15,224,000        
Ending balance at Sep. 30, 2018 99,792 $ 156 (5,017) 390,834 (285,372) (809)
Beginning balance (in shares) at Dec. 31, 2018   15,282,000        
Beginning balance at Dec. 31, 2018 102,518 $ 157 (5,017) 391,927 (283,643) (906)
Stock issued upon acquisition, net of offering costs (in shares)   123,000        
Stock issued upon acquisition, net of offering costs 555 $ 1   554    
Share based compensation 611     611    
Net loss (2,894)       (2,894)  
Other comprehensive income (loss) 267         267
Ending balance (in shares) at Mar. 31, 2019   15,405,000        
Ending balance at Mar. 31, 2019 101,057 $ 158 (5,017) 393,092 (286,537) (639)
Beginning balance (in shares) at Dec. 31, 2018   15,282,000        
Beginning balance at Dec. 31, 2018 102,518 $ 157 (5,017) 391,927 (283,643) (906)
Net loss (11,217)          
Ending balance (in shares) at Sep. 30, 2019   15,586,000        
Ending balance at Sep. 30, 2019 93,649 $ 160 (5,017) 394,810 (294,860) (1,444)
Beginning balance (in shares) at Mar. 31, 2019   15,405,000        
Beginning balance at Mar. 31, 2019 101,057 $ 158 (5,017) 393,092 (286,537) (639)
Share based compensation 392     392    
Net loss (4,967)       (4,967)  
Other comprehensive income (loss) (287)         (287)
Stock issued upon option exercise and vesting of restricted stock units (in shares)   93,000        
Stock issued upon option exercise and vesting of restricted stock units 467 $ 1   466    
Stock issued under the employee stock purchase plan (in shares)   53,000        
Stock issued under the employee stock purchase plan 255     255    
Ending balance (in shares) at Jun. 30, 2019   15,551,000        
Ending balance at Jun. 30, 2019 96,917 $ 159 (5,017) 394,205 (291,504) (926)
Share based compensation 577     577    
Net loss (3,356)       (3,356)  
Other comprehensive income (loss) $ (518)       0 (518)
Stock issued upon option exercise and vesting of restricted stock units (in shares) 5,000 35,000        
Stock issued upon option exercise and vesting of restricted stock units $ 29 $ 1   28    
Ending balance (in shares) at Sep. 30, 2019   15,586,000        
Ending balance at Sep. 30, 2019 $ 93,649 $ 160 $ (5,017) $ 394,810 $ (294,860) $ (1,444)