Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018
Current Assets:
Cash and cash equivalents	$ 55,005	$ 36,584
Short-term investments	7,336	13,170
Restricted cash	8,934	19,154
Accounts receivable, less allowance for doubtful accounts of $139 and $157	89,399	92,548
Contract assets	69,601	82,545
Inventories	25,046	21,352
Income taxes receivable	268	6,904
Prepaid expenses	3,707	3,775
Other current assets	1,232	630
Total Current Assets	260,528	276,662
Property, plant and equipment, net	123,838	128,764
Restricted cash	6,956	5,987
Goodwill and intangible assets, net	1,470	1,514
Deferred income taxes	6,453	5,937
Other assets	10,777	11,087
Total Assets	410,022	429,951
Current Liabilities:
Current maturities of long-term debt	400	400
Accounts payable	31,963	40,714
Contract liabilities	51,410	43,174
Accrued compensation and benefits	11,125	22,274
Accrued product warranty	2,732	2,604
Income taxes payable	878	897
Other current liabilities	8,275	7,786
Total Current Liabilities	106,783	117,849
Long-term debt, net of current maturities	800	1,200
Deferred compensation	5,839	5,902
Other long-term liabilities	4,242	3,356
Total Liabilities	117,664	128,307
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; 12,322,166 and 12,280,556 and shares issued, respectively	123	123
Additional paid-in capital	57,258	56,769
Retained earnings	285,843	291,530
Treasury stock, 806,018 shares at cost	(24,999)	(24,999)
Accumulated other comprehensive loss	(25,867)	(21,779)
Total Stockholders' Equity	292,358	301,644
Total Liabilities and Stockholders' Equity	$ 410,022	$ 429,951