Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016
Current Assets:
Cash and cash equivalents	$ 80,582	$ 97,720
Short-term investments	14,874	0
Accounts receivable, less allowance for doubtful accounts of $664 and $811	88,487	101,048
Costs and estimated earnings in excess of billings on uncompleted contracts	59,951	66,106
Inventories	23,976	26,521
Income taxes receivable	3,066	1,713
Deferred income taxes	4,347	4,006
Prepaid expenses	3,830	4,569
Other current assets	2,608	2,457
Total Current Assets	281,721	304,140
Property, plant and equipment, net	141,450	144,977
Goodwill and intangible assets, net	1,971	2,059
Other assets	11,850	11,340
Total Assets	436,992	462,516
Current Liabilities:
Current maturities of long-term debt	400	400
Income taxes payable	1,477	1,459
Accounts payable	32,670	34,985
Accrued salaries, bonuses and commissions	12,295	22,550
Billings in excess of costs and estimated earnings on uncompleted contracts	40,208	43,974
Accrued product warranty	4,230	4,639
Other accrued expenses	5,266	8,212
Deferred credit ─ short term (Note D)	2,029	2,029
Total Current Liabilities	98,575	118,248
Long-term debt, net of current maturities	1,600	2,000
Deferred compensation	4,815	4,840
Deferred income taxes	472	138
Other long-term liabilities	1,479	1,466
Deferred credit ─ long term (Note D)	0	507
Total Liabilities	106,941	127,199
Commitments and Contingencies (Note F)
Stockholders' Equity:
Preferred stock, par value $.01; 5,000,000 shares authorized; none issued	0	0
Common stock, par value $.01; 30,000,000 shares authorized; 12,217,656 and 12,199,511 shares issued, respectively	122	122
Additional paid-in capital	52,614	52,003
Retained earnings	328,693	331,959
Treasury stock, 806,018 shares at cost	(24,999)	(24,999)
Accumulated other comprehensive loss	(26,379)	(23,768)
Total Stockholders' Equity	330,051	335,317
Total Liabilities and Stockholders' Equity	$ 436,992	$ 462,516