Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Current Assets:
Cash and cash equivalents	$ 66,376	$ 36,584
Short-term investments	5,991	13,170
Restricted cash	10,835	19,154
Accounts receivable, less allowance for doubtful accounts of $214 and $157	81,270	92,548
Contract assets	70,727	82,545
Inventories	24,724	21,352
Income taxes receivable	93	6,904
Prepaid expenses	2,275	3,775
Other current assets	2,068	630
Total Current Assets	264,359	276,662
Property, plant and equipment, net	122,836	128,764
Restricted cash	7,791	5,987
Goodwill and intangible assets, net	1,426	1,514
Deferred income taxes	6,283	5,937
Other assets	10,909	11,087
Total Assets	413,604	429,951
Current Liabilities:
Current maturities of long-term debt	400	400
Accounts payable	33,565	40,714
Contract liabilities	51,088	43,174
Accrued compensation and benefits	12,255	22,274
Accrued product warranty	2,986	2,604
Income taxes payable	279	897
Other current liabilities	9,710	7,786
Total Current Liabilities	110,283	117,849
Long-term debt, net of current maturities	800	1,200
Deferred compensation	6,347	5,902
Other long-term liabilities	3,880	3,356
Total Liabilities	121,310	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; 12,353,166 and 12,280,556 shares issued, respectively	124	123
Additional paid-in capital	57,511	56,769
Retained earnings	283,805	291,530
Treasury stock, 806,018 shares at cost	(24,999)	(24,999)
Accumulated other comprehensive loss	(24,147)	(21,779)
Total Stockholders' Equity	292,294	301,644
Total Liabilities and Stockholders' Equity	$ 413,604	$ 429,951