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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income (loss) | $ 23,811 | $ (40,712) | $ 51,869
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities |  |  |
Deferred income tax expense (benefit) | 7,645 | (6,640) | (2,139)
Depreciation | 3,715 | 3,513 | 3,422
Stock compensation expense | 2,938 | 2,131 | 1,645
Lease expense | 1,820 | 1,004 |
Amortization of purchased intangible assets | 904 | 1,136 | 1,012
Impairment losses | 0 | 4,895 | 1,491
Other | 641 | 889 | (301)
Changes in operating assets and liabilities |  |  |
Accounts receivable | 8,463 | (1,038) | (10,200)
Contract assets | 6,744 | 24,978 | (44,510)
Other assets | (12,800) | 2,357 | (15,160)
Accounts payable and accrued expenses | 31,442 | (3,284) | (60,187)
Contract liabilities | 99,357 | 64,336 | (39,264)
Net cash provided by (used in) operating activities | 174,680 | 53,565 | (112,322)
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Maturities of short-term investments | 170,000 | 166,000 | 370,000
Purchases of short-term investments | (100,000) | (195,000) | (191,000)
Purchases of property, plant and equipment | (1,697) | (7,058) | (8,599)
Changes in notes receivable |  |  | 225
Net cash provided by (used in) investing activities | 68,303 | (36,058) | 170,626
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Payments of cash dividends | (47,047) | (15,621) | (15,570)
Proceeds from the exercise of stock options | 1,641 | 1,630 | 102
Distributions to joint venture partner |  |  | (72)
Net cash used in financing activities | (45,406) | (13,991) | (15,540)
EFFECTS OF EXCHANGE RATE CHANGES ON CASH | 1,731 | (471) | (553)
NET INCREASE IN CASH AND CASH EQUIVALENTS | 199,308 | 3,045 | 42,211
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD | 167,363 | 164,318 | 122,107
CASH AND CASH EQUIVALENTS, END OF PERIOD | $ 366,671 | $ 167,363 | $ 164,318

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