CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 451,415	$ 366,671
Short-term investments	40,065	90,055
Accounts receivable	43,120	28,713
Contract assets	25,377	26,635
Other current assets (Note 10)	37,679	34,146
TOTAL CURRENT ASSETS	597,656	546,220
Property, plant and equipment, net	19,209	20,361
Goodwill	27,943	27,943
Other purchased intangible assets, net	3,644	4,097
Deferred taxes		249
Right-of-use and other assets	3,537	3,760
TOTAL ASSETS	651,989	602,630
LIABILITIES AND EQUITY CURRENT LIABILITIES
Accounts payable	44,317	53,295
Accrued expenses	49,308	50,750
Contract liabilities	213,722	172,042
TOTAL CURRENT LIABILITIES	307,347	276,087
Deferred taxes	751
Other noncurrent liabilities	3,356	4,135
TOTAL LIABILITIES	311,454	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 July 31, 2021 and January 31, 2021, respectively; 15,769,440 and 15,702,969 shares outstanding at July 31, 2021 and January 31, 2021, respectively	2,366	2,356
Additional paid-in capital	155,904	153,282
Retained earnings	181,862	166,110
Accumulated other comprehensive loss	(1,338)	(1,081)
TOTAL STOCKHOLDERS' EQUITY	338,794	320,667
Non-controlling interests	1,741	1,741
TOTAL EQUITY	340,535	322,408
TOTAL STOCKHOLDERS' EQUITY	$ 651,989	$ 602,630