CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2019	Jan. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 252,482	$ 164,318
Short-term investments	42,107	132,213
Accounts receivable, net	34,880	36,174
Contract assets	50,365	58,357
Other current assets	26,066	25,286
TOTAL CURRENT ASSETS	405,900	416,348
Property, plant and equipment, net	23,211	19,778
Goodwill	30,766	32,838
Other purchased intangible assets, net	5,273	6,137
Rights-of-use assets (Note 7)	1,338
Deferred taxes	5,911	1,257
Other assets	318	290
TOTAL ASSETS	472,717	476,648
LIABILITIES AND EQUITY CURRENT LIABILITIES
Accounts payable	38,249	39,870
Accrued expenses (Notes 2, 7 and 11)	22,287	33,097
Contract liabilities	58,421	8,349
TOTAL CURRENT LIABILITIES	118,957	81,316
Lease liabilities (Note 7)	563
Other noncurrent liabilities	1,779	960
TOTAL LIABILITIES	121,299	82,276
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; 15,636,535 and 15,577,102 shares issued at October 31 and January 31, 2019, respectively; 15,633,302 and 15,573,869 shares outstanding at October 31 and January 31, 2019, respectively	2,346	2,337
Additional paid-in capital	148,031	144,961
Retained earnings	200,401	247,616
Accumulated other comprehensive loss	(1,171)	(346)
TOTAL STOCKHOLDERS' EQUITY	349,607	394,568
Non-controlling interests	1,811	(196)
TOTAL EQUITY	351,418	394,372
TOTAL LIABILITIES AND EQUITY	$ 472,717	$ 476,648