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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net (loss) income | $ (40,712) | $ 51,869 | $ 72,346
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities |  |  |
Impairment losses (Note 7) | 4,895 | 1,491 | 584
Depreciation | 3,513 | 3,422 | 2,779
Stock compensation expense | 2,131 | 1,645 | 4,651
Amortization of purchased intangible assets | 1,136 | 1,012 | 1,032
Operating lease expense | 1,004 |  |
Change in accrued interest on short-term investments | 714 | 695 | (1,112)
Deferred income tax benefit | (6,640) | (2,139) | (64)
Other | 175 | (996) | (136)
Changes in operating assets and liabilities |  |  |
Accounts receivable | (1,038) | (10,200) | (5,687)
Contract assets | 24,978 | (44,510) | (6,646)
Other assets | 2,357 | (15,160) | (4,574)
Accounts payable and accrued expenses | (3,284) | (60,187) | (6,164)
Contract liabilities | 64,336 | (39,264) | (129,802)
Net cash provided by (used in) operating activities | 53,565 | (112,322) | (72,793)
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Maturities of short-term investments | 166,000 | 370,000 | 587,500
Purchases of short-term investments | (195,000) | (191,000) | (542,500)
Purchases of property, plant and equipment | (7,058) | (8,599) | (4,826)
Changes in notes receivable |  | 225 | (1,500)
Net cash (used in) provided by investing activities | (36,058) | 170,626 | 38,674
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Payments of cash dividends | (15,621) | (15,570) | (15,548)
Proceeds from the exercise of stock options | 1,630 | 102 | 3,155
Distributions to joint venture partners |  | (72) | (1,229)
Net cash used in financing activities | (13,991) | (15,540) | (13,622)
EFFECTS OF EXCHANGE RATE CHANGES ON CASH | (471) | (553) | 2,650
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 3,045 | 42,211 | (45,091)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR | 164,318 | 122,107 | 167,198
CASH AND CASH EQUIVALENTS, END OF YEAR | 167,363 | 164,318 | 122,107
SUPPLEMENTAL CASH FLOW INFORMATION (Notes 2, 10 and 13) |  |  |
Cash paid for income taxes | 3,100 | 3,900 | 44,300
Cash received from income tax refunds | 8,400 | $ 0 | $ 0
Operating lease payments made | $ 1,000 |  |

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