CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Current Assets:
Cash and cash equivalents	$ 114,314	$ 160,216
Short-term investments	19,667	18,705
Accounts receivable, less allowance for doubtful accounts of $333 and $510	78,304	69,957
Contract assets	54,199	50,995
Inventories	29,835	28,968
Income taxes receivable	161	467
Prepaid expenses	4,382	4,402
Other current assets	1,599	1,948
Total Current Assets	302,461	335,658
Property, plant and equipment, net	109,457	114,372
Operating lease assets, net	3,453	5,217
Goodwill and intangible assets, net	1,003	1,161
Other assets	4,639	3,644
Deferred income taxes	15,179	12,226
Total Assets	436,192	472,278
Current Liabilities:
Current maturities of long-term debt	400	400
Accounts payable	45,247	35,029
Contract liabilities	42,433	79,445
Accrued compensation and benefits	20,395	21,739
Accrued product warranty	2,531	2,771
Current operating lease liabilities	1,415	2,352
Income taxes payable	1,076	1,861
Other current liabilities	7,659	9,350
Total Current Liabilities	121,156	152,947
Long-term debt, net of current maturities	0	400
Deferred compensation (Note J)	8,613	6,710
Operating Lease, Liability, Noncurrent	2,413	3,434
Other long-term liabilities	2,787	2,161
Total Liabilities	134,969	165,652
Commitments and Contingencies (Note H)
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; 12,497,691 and 12,422,411 shares issued, respectively	125	124
Additional paid-in capital	63,948	61,998
Retained earnings	282,505	294,016
Treasury stock, 806,018 shares at cost	(24,999)	(24,999)
Accumulated other comprehensive loss	(20,356)	(24,513)
Total Stockholders' Equity	301,223	306,626
Total Liabilities and Stockholders' Equity	$ 436,192	$ 472,278