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Equity
 9 Months Ended
Oct. 31, 2021
Equity [Abstract]  
Equity EquityThe following table summarizes the changes in stockholders' equity during the three and nine months ended October 31, 2021:
Accumulated
AdditionalOtherTotal
Common StockPaid-InComprehensiveAccumulatedTreasuryStockholders’
(in thousands)SharesAmountCapitalIncomeDeficitStockEquity
Balance, January 31, 2021
123,989 $130 $733,933 $2,422 $(517,345)$(11,905)$207,235 
Exercise of stock options1,069 1 12,110 — — — 12,111 
Vested restricted stock units converted to common shares871 1 (1)— — — — 
Issuance of restricted stock4 — — — — — — 
Issuance of common stock under employee stock purchase plan282 — 3,817 — — — 3,817 
Stock-based compensation— — 15,288 — — — 15,288 
Other comprehensive income— — — 355 — — 355 
Net loss— — — — (17,631)— (17,631)
Balance, April 30, 2021
126,215 132 765,147 2,777 (534,976)(11,905)221,175 
Exercise of stock options402 1 2,273 — — — 2,274 
Vested restricted stock units converted to common shares1,172 1 (1)— — — — 
Issuance of restricted stock11 — — — — — — 
Stock-based compensation— — 20,730 — — — 20,730 
Other comprehensive loss— — — (8)— — (8)
Net loss— — — — (27,592)— (27,592)
Balance, July 31, 2021
127,800 134 788,149 2,769 (562,568)(11,905)216,579 
Exercise of stock options357 — 2,641 — — — 2,641 
Vested restricted stock units converted to common shares1,267 1 (1)— — — — 
Issuance of restricted stock— — — — — — — 
Issuance of common stock under employee stock purchase plans249 1 2,667 — — — 2,668 
Stock-based compensation— — 19,637 — — — 19,637 
Other comprehensive loss— — — (1,586)— — (1,586)
Net loss— — — — (24,926)— (24,926)
Balance, October 31, 2021
129,673 $136 $813,093 $1,183 $(587,494)$(11,905)$215,013 
The following table summarizes the changes in stockholders' equity during the three and nine months ended October 31, 2020:
Accumulated
AdditionalOtherTotal
Common StockPaid-InComprehensiveAccumulatedTreasuryStockholders’
(in thousands)SharesAmountCapitalIncome (Loss)DeficitStockEquity
Balance, January 31, 2020
115,830 $122 $636,008 $(360)$(422,653)$(11,905)$201,212 
Exercise of stock options391 1 1,895 — — — 1,896 
Vested restricted stock units converted to common shares903 1 (1)— — — — 
Issuance of restricted stock26 — — — — — — 
Issuance of common stock under employee stock purchase plan374 — 3,743 — — — 3,743 
Stock-based compensation— — 17,617 — — — 17,617 
Other comprehensive loss— — — (1,333)— — (1,333)
Net loss— — — — (29,224)— (29,224)
Balance, April 30, 2020
117,524 124 659,262 (1,693)(451,877)(11,905)193,911 
Exercise of stock options935 1 4,750 — — — 4,751 
Vested restricted stock units converted to common shares1,041 1 (1)— — — — 
Issuance of restricted stock12 — — — — — — 
Stock-based compensation— — 17,752 — — — 17,752 
Other comprehensive income— — — 2,250 — — 2,250 
Net loss— — — — (25,116)— (25,116)
Balance, July 31, 2020
119,512 126 681,763 557 (476,993)(11,905)193,548 
Exercise of stock options1,148 1 6,564 — — — 6,565 
Vested restricted stock units converted to common shares1,191 1 (1)— — — — 
Issuance of common stock under employee stock purchase plan325 1 3,256 — — — 3,257 
Stock-based compensation— — 19,831 — — — 19,831 
Other comprehensive loss— — — (497)— — (497)
Net loss— — — — (22,041)— (22,041)
Balance, October 31, 2020
122,176 $129 $711,413 $60 $(499,034)$(11,905)$200,663 
Preferred Stock
Effective April 2017, the Company’s Board of Directors is authorized to issue up to 50,000,000 shares of preferred stock, $0.001 par value, in one or more series without stockholder approval. The Company's Board of Directors has the discretion to determine the rights, preferences, privileges and restrictions, including voting rights, dividend rights, conversion rights, redemption privileges and liquidation preferences, of each series of preferred stock. The issuance of preferred stock could have the effect of restricting dividends on the Company’s common stock, diluting the voting power of its common stock, impairing the liquidation rights of its common stock, or delaying or preventing changes in control or management of the Company. As of October 31, 2021 and January 31, 2021, no shares of preferred stock were issued or outstanding.
Common Stock
        As of October 31, 2021 and January 31, 2021, the Company had authorized 500,000,000 shares of voting $0.001 par value common stock. Each holder of the Company's common stock is entitled to one vote for each share on all matters to be voted upon by the stockholders and there are no cumulative rights. Subject to any preferential rights of any outstanding preferred stock, holders of the Company's common stock are entitled to receive ratably the dividends, if any, as may be declared from time to time by the Company's Board of Directors out of legally available funds. If there is a liquidation, dissolution or winding up of the Company, holders of the Company's common stock would be entitled to share in the Company's assets remaining after the payment of liabilities and any preferential rights of any outstanding preferred stock.
        Holders of the Company's common stock have no preemptive or conversion rights or other subscription rights, and there are no redemption or sinking fund provisions applicable to the common stock. All outstanding shares of the Company's common stock will be fully paid and non-assessable. The rights, preferences and privileges of the holders of the Company's common stock are subject to,
and may be adversely affected by, the rights of the holders of shares of any series of preferred stock which the Company may designate and issue in the future.
Treasury Stock
 As of October 31, 2021 and January 31, 2021, the Company had 6,505,334 shares of treasury stock which are carried at its cost basis of $11.9 million on the Company's condensed consolidated balance sheets.