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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jul. 31, 2020 | Jul. 31, 2019
Cash flows from operating activities: |  |
Net loss | $ (1,433) | $ (9,723)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation expense | 6,098 | 6,393
Depreciation and amortization of capital expenditures | 1,469 | 1,347
Amortization of intangible assets | 652 | 516
Non-cash operating lease expense | 1,592 | 899
Other | 24 | (224)
Changes in operating assets and liabilities: |  |
Accounts receivable, net | 327 | 43
Inventories and deferred inventory costs | (524) | (1,389)
Prepaid expenses and other assets | (1,818) | (2,303)
Accounts payable and other liabilities | (7,140) | (2,139)
Deferred revenue | 418 | 425
Net cash used in operating activities | (335) | (6,155)
Cash flows from investing activities: |  |
Purchases of short-term investments | (12,013) | (19,196)
Proceeds from maturities and sales of short-term investments | 11,986 | 32,046
Capital expenditures | (1,508) | (1,632)
Business acquisition, net of cash assumed |  | (7,073)
Net cash (used in) provided by investing activities | (1,535) | 4,145
Cash flows from financing activities: |  |
Proceeds from issuance of common stock | 1,901 | 1,808
Payment of acquisition-related holdback |  | (420)
Net cash provided by financing activities | 1,079 | 658
Net decrease in cash and cash equivalents | (791) | (1,352)
Cash and cash equivalents at beginning of period | 11,680 | 15,370
Cash and cash equivalents at end of period | 10,889 | 14,018
Restricted Stock Units (RSUs) |  |
Cash flows from financing activities: |  |
Shares repurchased for tax withholdings on vesting of restricted stock units ("RSU") | $ (822) | $ (730)

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