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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($)
$ in Thousands
Total
Common stock and APIC
 [1]
AOCI
 [2]
Accumulated Deficit
BALANCE at Jan. 31, 2018 $ 37,068 $ 128,083 $ (84) $ (90,931)
Issuance of common stock under equity-based plans 1,205 1,205    
Shares repurchased for tax withholdings on RSU vesting (759) (759)    
Issuance of common stock for business acquisition 390 390    
Stock-based compensation 2,314 2,314    
Changes in comprehensive income (loss) (1)   (1)  
Cumulative adjustment upon adoption of Topic 606 (292)     (292)
Net loss (3,685)     (3,685)
BALANCE at Apr. 30, 2018 36,240 131,233 (85) (94,908)
BALANCE at Jan. 31, 2018 37,068 128,083 (84) (90,931)
Net loss (11,083)      
BALANCE at Oct. 31, 2018 34,381 136,721 (34) (102,306)
BALANCE at Apr. 30, 2018 36,240 131,233 (85) (94,908)
Issuance of common stock under equity-based plans 488 488    
Shares repurchased for tax withholdings on RSU vesting (441) (441)    
Stock-based compensation 2,762 2,762    
Changes in comprehensive income (loss) 36   36  
Net loss (3,904)     (3,904)
BALANCE at Jul. 31, 2018 35,181 134,042 (49) (98,812)
Issuance of common stock under equity-based plans 1,118 1,118    
Shares repurchased for tax withholdings on RSU vesting (1,097) (1,097)    
Stock-based compensation 2,658 2,658    
Changes in comprehensive income (loss) 15   15  
Net loss (3,494)     (3,494)
BALANCE at Oct. 31, 2018 34,381 136,721 (34) (102,306)
BALANCE at Jan. 31, 2019 33,047 138,852 (10) (105,795)
Issuance of common stock under equity-based plans 1,454 1,454    
Shares repurchased for tax withholdings on RSU vesting (730) (730)    
Stock-based compensation 2,982 2,982    
Changes in comprehensive income (loss) 11   11  
Net loss (4,740)     (4,740)
BALANCE at Apr. 30, 2019 32,024 142,558 1 (110,535)
BALANCE at Jan. 31, 2019 33,047 138,852 (10) (105,795)
Net loss (16,507)      
BALANCE at Oct. 31, 2019 27,428 149,716 14 (122,302)
BALANCE at Apr. 30, 2019 32,024 142,558 1 (110,535)
Issuance of common stock under equity-based plans 354 354    
Stock-based compensation 3,411 3,411    
Changes in comprehensive income (loss) 5   5  
Net loss (4,983)     (4,983)
BALANCE at Jul. 31, 2019 30,811 146,323 6 (115,518)
Issuance of common stock under equity-based plans 932 932    
Shares repurchased for tax withholdings on RSU vesting (793) (793)    
Stock-based compensation 3,254 3,254    
Changes in comprehensive income (loss) 8   8  
Net loss (6,784)     (6,784)
BALANCE at Oct. 31, 2019 $ 27,428 $ 149,716 $ 14 $ (122,302)
[1] Additional paid-in capital
[2] Accumulated other comprehensive income (loss)