CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Current Assets:
Cash and cash equivalents	$ 36,584	$ 68,359
Short-term investments	13,170	26,829
Restricted cash	19,154	15,104
Accounts receivable, less allowance for doubtful accounts of $157 and $179	92,548	53,852
Costs and estimated earnings in excess of billings on uncompleted contracts	82,545	51,554
Inventories	21,352	18,448
Income taxes receivable	6,904	8,222
Deferred income taxes	0	3,539
Prepaid expenses	3,775	3,701
Other current assets	630	463
Total Current Assets	276,662	250,071
Property, plant and equipment, net	128,764	139,420
Restricted cash	5,987	9,747
Goodwill and intangible assets, net	1,514	1,719
Other assets	11,087	13,800
Deferred income taxes	5,937	229
Total Assets	429,951	414,986
Current Liabilities:
Current maturities of long-term debt	400	400
Income taxes payable	897	1,219
Accounts payable	40,714	33,269
Accrued compensation and benefits	22,274	14,984
Billings in excess of costs and estimated earnings on uncompleted contracts	43,174	26,166
Accrued product warranty	2,604	3,174
Other current liabilities	7,786	5,860
Deferred credit ─ short term (Note E)	0	507
Total Current Liabilities	117,849	85,579
Long-term debt, net of current maturities	1,200	1,600
Deferred compensation (Note I)	5,902	5,314
Other long-term liabilities	3,356	1,197
Total Liabilities	128,307	93,690
Commitments and Contingencies (Note G)
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; 12,280,556 and 12,234,656 shares issued, respectively	123	122
Additional paid-in capital	56,769	54,329
Retained earnings	291,530	310,598
Treasury stock, 806,018 shares at cost	(24,999)	(24,999)
Accumulated other comprehensive loss	(21,779)	(18,754)
Total Stockholders' Equity	301,644	321,296
Total Liabilities and Stockholders' Equity	$ 429,951	$ 414,986