CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2020	Jan. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 353,213	$ 167,363
Short-term investments	90,017	160,499
Accounts receivable, net	30,607	37,192
Contract assets	27,223	33,379
Other current assets (Note 10)	37,760	23,322
TOTAL CURRENT ASSETS	538,820	421,755
Property, plant and equipment, net	20,966	22,539
Goodwill	27,943	27,943
Other purchased intangible assets, net	4,324	5,001
Deferred taxes		7,894
Right-of-use and other assets	3,447	2,408
TOTAL ASSETS	595,500	487,540
LIABILITIES AND EQUITY CURRENT LIABILITIES
Accounts payable	48,836	35,442
Accrued expenses (Note 10)	51,650	35,907
Contract liabilities	160,544	72,685
TOTAL CURRENT LIABILITIES	261,030	144,034
Deferred taxes	472
Other noncurrent liabilities	3,334	2,476
TOTAL LIABILITIES	264,836	146,510
COMMITMENTS AND CONTINGENCIES (Notes 7 and 8)
STOCKHOLDERS' EQUITY
Preferred stock, par value $0.10 per share - 500,000 shares authorized; no shares issued and outstanding
Common stock, par value $0.15 per share - 30,000,000 shares authorized; 15,693,202 and 15,638,202 shares issued at October 31 and January 31, 2020, respectively; 15,689,969 and 15,634,969 shares outstanding at October 31 and January 31, 2020, respectively	2,354	2,346
Additional paid-in capital	152,149	148,713
Retained earnings	176,186	189,306
Accumulated other comprehensive loss	(1,766)	(1,116)
TOTAL STOCKHOLDERS' EQUITY	328,923	339,249
Non-controlling interests	1,741	1,781
TOTAL EQUITY	330,664	341,030
TOTAL LIABILITIES AND EQUITY	$ 595,500	$ 487,540