CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (29,913)	$ 4,842
Adjustments to reconcile net (loss) income to net cash used in operating activities
Impairment loss	2,072
Depreciation	829	771
Stock compensation expense	413	568
Amortization of purchased intangible assets	299	253
Deferred income tax expense	259	162
Other	(129)	(412)
Changes in operating assets and liabilities
Accounts receivable	(12,049)	(9,522)
Contract assets	9,821	(36,732)
Other assets	3,962	(2,970)
Accounts payable and accrued expenses	(10,497)	(745)
Contract liabilities	(1,449)	(17,150)
Net cash (used in) provided by operating activities	(36,382)	(60,935)
CASH FLOWS FROM INVESTING ACTIVITIES
Maturities of short-term investments	44,000	103,000
Purchases of short-term investments	(35,000)	(5,000)
Purchases of property, plant and equipment	(1,985)	(3,691)
Changes in notes receivable		225
Net cash provided by (used in) investing activities	7,015	94,534
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividends paid	(3,895)	(3,892)
Proceeds from the exercise of stock options	1,567
Net cash used in financing activities	(2,328)	(3,892)
EFFECTS OF EXCHANGE RATE CHANGES ON CASH	(235)	(291)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(31,930)	29,416
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	164,318	122,107
CASH AND CASH EQUIVALENTS, END OF YEAR	132,388	151,523
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for income taxes	454	$ 967
Cash received from income tax refunds	6,143
Operating lease payments made (Note 7)	141
Adoption of ASC Topic 842 (non-cash transaction, see Note 7)	$ 1,341