Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Current Assets:
Cash and cash equivalents	$ 77,905	$ 114,314
Short-term investments	23,622	19,667
Accounts receivable, less allowance for credit losses of $411 and $333	79,478	78,304
Contract assets	67,904	54,199
Inventories	36,157	29,835
Income taxes receivable	217	161
Prepaid expenses	4,033	4,382
Other current assets	1,092	1,599
Total Current Assets	290,408	302,461
Property, plant and equipment, net	107,509	109,457
Operating lease assets, net	3,526	3,453
Goodwill and intangible assets, net	1,003	1,003
Deferred income taxes	5,554	4,639
Other assets	15,800	15,179
Total Assets	423,800	436,192
Current Liabilities:
Current maturities of long-term debt	0	400
Accounts payable	42,348	45,247
Contract liabilities	49,396	42,433
Accrued compensation and benefits	8,152	20,395
Accrued product warranty	2,443	2,531
Current operating lease liabilities	1,966	1,415
Income taxes payable	554	1,076
Other current liabilities	8,809	7,659
Total Current Liabilities	113,668	121,156
Long-term debt, net of current maturities	0	0
Deferred compensation	9,749	8,613
Long-term operating lease liabilities	1,866	2,413
Other long-term liabilities	2,938	2,787
Total Liabilities	128,221	134,969
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; 12,569,861 and 12,497,691 shares issued, respectively	126	125
Additional paid-in capital	64,364	63,948
Retained earnings	276,390	282,505
Treasury stock, 806,018 shares at cost	(24,999)	(24,999)
Accumulated other comprehensive loss	(20,302)	(20,356)
Total Stockholders' Equity	295,579	301,223
Total Liabilities and Stockholders' Equity	$ 423,800	$ 436,192