v3.25.2
Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
Aug. 31, 2025
May 31, 2025
Current assets    
Cash and cash equivalents $ 2,153,006 $ 1,190,656
Short-term investments 34,151,464 34,799,367
Accounts and other receivables, net 4,523,521 5,599,785
Inventory 8,504,958 8,113,321
Costs and estimated earnings in excess of billings 4,704,141 5,360,499
Other current assets 1,590,817 1,219,211
Total current assets 55,627,907 56,282,839
Maintenance and other inventory, net 1,208,346 1,107,875
Property and equipment, net 11,806,321 12,074,172
Patents, net 264,814 270,370
Other assets 285,956 284,864
Deferred income taxes 1,098,000 1,598,000
Assets 70,291,344 71,618,120
Current liabilities    
Accounts payable 1,032,023 1,119,240
Accrued expenses 2,143,169 4,072,436
Billings in excess of costs and estimated earnings 2,864,793 4,382,067
Total current liabilities 6,039,985 9,573,743
Stockholders' equity    
Common stock and additional paid-in capital 14,697,809 14,649,415
Retained earnings 62,730,238 60,540,154
Treasury stock - at cost (13,176,688) (13,145,192)
Total stockholders' equity 64,251,359 62,044,377
Liabilities and Equity $ 70,291,344 $ 71,618,120