CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Apr. 30, 2021	Jan. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 396,675	$ 366,671
Short-term investments	70,075	90,055
Accounts receivable	32,379	28,713
Contract assets	26,158	26,635
Other current assets (Note 10)	33,744	34,146
TOTAL CURRENT ASSETS	559,031	546,220
Property, plant and equipment, net	19,944	20,361
Goodwill	27,943	27,943
Other purchased intangible assets, net	3,869	4,097
Deferred taxes		249
Right-of-use and other assets	7,185	3,760
TOTAL ASSETS	617,972	602,630
LIABILITIES AND EQUITY CURRENT LIABILITIES
Accounts payable	41,467	53,295
Accrued expenses	42,050	50,750
Contract liabilities	199,548	172,042
TOTAL CURRENT LIABILITIES	283,065	276,087
Deferred taxes	350
Other noncurrent liabilities	3,741	4,135
TOTAL LIABILITIES	287,156	280,222
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; 15,772,673 and 15,706,202 shares issued at April 30, 2021 and January 31, 2021 respectively; 15,769,440 and 15,702,969 shares outstanding at April 30, 2021 and January 31, 2021, respectively	2,366	2,356
Additional paid-in capital	154,974	153,282
Retained earnings	172,934	166,110
Accumulated other comprehensive loss	(1,199)	(1,081)
TOTAL STOCKHOLDERS' EQUITY	329,075	320,667
Non-controlling interests	1,741	1,741
TOTAL EQUITY	330,816	322,408
TOTAL STOCKHOLDERS' EQUITY	$ 617,972	$ 602,630