CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	$ 32,358	$ 34,704	$ 35,706
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Stock compensation expense	4,455	3,958	3,459
Changes in accrued interest on investments	(3,899)	(1,735)	29
Depreciation	2,013	2,983	3,367
Lease expense	1,906	2,554	3,391
Deferred income tax expense (benefit)	1,333	(3,232)	(208)
Amortization of intangible assets	392	732	870
Equity in loss (income) of solar energy investments	130	(1,113)	466
Provisions for credit losses		92	2,381
Impairment loss			7,901
Other	198	7	(71)
Changes in operating assets and liabilities
Accounts receivable	2,764	(23,246)	(480)
Contract assets	(23,411)	(19,874)	21,741
Other assets	(1,004)	(3,346)	(241)
Accounts payable and accrued expenses	14,830	9,084	(5,742)
Contract liabilities	84,793	(31,629)	(44,154)
Net cash provided by (used in) operating activities	116,858	(30,061)	28,415
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of short-term investments	(115,000)	(249,750)	(90,000)
Maturities of short-term investments	159,750	190,000	90,000
Purchases of available-for-sale securities	(104,492)
Purchases of property, plant and equipment	(2,756)	(3,372)	(1,422)
Investments in solar energy projects	(5,109)		(5,016)
Acquisition of Lee Telecom, Inc.			(600)
Net cash used in investing activities	(67,607)	(63,122)	(7,038)
CASH FLOWS FROM FINANCING ACTIVITIES
Common stock repurchases	(12,464)	(68,236)	(20,372)
Payments of cash dividends	(14,683)	(13,956)	(15,664)
Distribution to non-controlling interest		(677)
Proceeds from share-based award settlements	1,097	66	1,428
Net cash used in financing activities	(26,050)	(82,803)	(34,608)
EFFECTS OF EXCHANGE RATE CHANGES ON CASH	(116)	(539)	(2,968)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	23,085	(176,525)	(16,199)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	173,947	350,472	366,671
CASH AND CASH EQUIVALENTS, END OF PERIOD	197,032	173,947	350,472
NON-CASH INVESTING AND FINANCING ACTIVITIES
Investments in solar energy projects not yet paid	3,312
Right-of-use assets obtained in exchange for lease obligations	2,444	3,678	3,525
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for income taxes, net of refunds	14,297	6,665	13,897
Cash paid for operating leases	$ 1,910	$ 2,552	$ 3,290