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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jul. 31, 2024
Jul. 31, 2023
Statement of Cash Flows [Abstract]    
Net income including noncontrolling interests $ 27,280 $ 18,984
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 8,824 8,915
Amortization of operating lease right-of-use assets 3,153 2,671
Income from equity method investments (3,465) (4,537)
Interest income from investments (3,292) (3,967)
Deferred income tax 5,495 3,947
Stock based compensation expense 1,772 3,892
Loss on disposal of property and equipment – net 78 205
Changes in assets and liabilities:    
Accounts receivable (1,077) (6,836)
Inventories (2,178) 2,784
Refundable income taxes 456 (2,692)
Other assets (12,344) (7,162)
Accounts payable, trade (14,009) (12,595)
Other liabilities (4,985) 3,019
Net cash provided by operating activities 5,708 6,628
Cash flows from investing activities:    
Capital expenditures (40,219) (8,173)
Purchase of short-term investments (156,125) (194,400)
Maturity of short-term investments 229,735 227,490
Proceeds from sale of real estate and property and equipment 178 10
Deposits 203 (20)
Net cash provided by investing activities 33,772 24,907
Cash flows from financing activities:    
Payments to noncontrolling interests holders (1,837) (716)
Net cash used in financing activities (1,837) (716)
Net increase in cash and cash equivalents 37,643 30,819
Cash and cash equivalents, beginning of period 223,397 71,347
Cash and cash equivalents, end of period 261,040 102,166
Non cash investing activities – Accrued capital expenditures 4,573 1,029
Non cash investing activities – Capital additions transferred from prepaid expenses 188  
Non cash financing activities – Stock awards accrued 798 570
Non cash financing activities – Stock awards issued 2,172 965
Right-of-use assets acquired and liabilities incurred upon lease execution $ 3,335 $ 312