CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Current assets:
Cash and cash equivalents	$ 44,886	$ 50,752
Short-term investments	19,692	19,960
Trade accounts receivable, net	22,676	16,229
Current portion of notes receivable, net	3,534	3,806
Inventories, net	97,316	83,894
Costs and estimated earnings in excess of billings	6,325
Deferred income tax assets	6,437	6,689
Other current assets	9,764	5,898
Total current assets	210,630	187,228
Rental equipment, net	33,226	27,853
Property, plant and equipment, net	39,901	34,433
Goodwill	1,843	1,843
Non-current deferred income tax assets	431	307
Non-current notes receivable, net	1,236	1,687
Prepaid income taxes	6,710	5,479
Other assets	122	192
Total assets	294,099	259,022
Current liabilities:
Accounts payable trade	17,347	17,187
Accrued expenses and other current liabilities	13,722	13,978
Deferred revenue	10,800	8,641
Deferred income tax liabilities	142	111
Income tax payable	9,729	1,275
Total current liabilities	51,740	41,192
Non-current deferred income tax liabilities	3,285	2,843
Total liabilities	55,025	44,035
Commitments and contingencies
Stockholders' equity:
Preferred stock
Common stock	129	128
Additional paid-in capital	62,408	60,633
Retained earnings	176,464	154,451
Accumulated other comprehensive income (loss)	73	(225)
Total stockholders' equity	239,074	214,987
Total liabilities and stockholders' equity	$ 294,099	$ 259,022