Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Current Assets:
Cash and cash equivalents	$ 321,400	$ 245,875
Short-term investments	33,943	33,134
Accounts receivable, less allowance for credit losses of $244 and $273	169,477	206,591
Contract assets	67,594	60,621
Inventories	69,682	63,865
Income taxes receivable	64	100
Prepaid expenses	5,252	5,419
Other current assets	7,413	6,380
Total Current Assets	674,825	621,985
Property, plant and equipment, net	98,318	97,625
Operating lease assets, net	1,218	1,436
Goodwill and intangible assets, net	1,503	1,003
Deferred income taxes	17,229	17,064
Other assets	14,856	13,129
Total Assets	807,949	752,242
Current Liabilities:
Accounts payable	50,173	56,666
Contract liabilities	328,888	279,796
Accrued compensation and benefits	11,637	29,947
Accrued product warranty	3,680	3,305
Current operating lease liabilities	645	773
Income taxes payable	11,985	6,517
Other current liabilities	20,843	18,682
Total Current Liabilities	427,851	395,686
Deferred compensation	10,965	9,145
Long-term operating lease liabilities	573	663
Other long-term liabilities	2,240	1,722
Total Liabilities	441,629	407,216
Commitments and Contingencies (Note F)
Stockholders' Equity:
Preferred stock, par value $0.01; 5,000,000 shares authorized; none issued	0	0
Common stock, par value $0.01; 30,000,000 shares authorized; 12,765,936 and 12,668,001 shares issued, respectively; 11,959,918 and 11,861,983 shares outstanding, respectively	127	127
Additional paid-in capital	68,854	71,526
Retained earnings	346,162	325,281
Treasury stock, 806,018 shares at cost	(24,999)	(24,999)
Accumulated other comprehensive loss	(23,824)	(26,909)
Total Stockholders' Equity	366,320	345,026
Total Liabilities and Stockholders' Equity	$ 807,949	$ 752,242