Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2011	Sep. 30, 2010
ASSETS
Cash and cash equivalents	$ 31,388	$ 33,453
Short-term investments	4,926
Trade accounts receivable, net of allowance of $411 and $334	19,761	19,107
Current portion of notes receivable, net of allowance of $0	2,100	2,400
Inventories, net	72,390	47,395
Deferred income tax asset	6,356	4,542
Other current assets	5,660	3,089
Total current assets	142,581	109,986
Rental equipment, net	11,945	8,003
Property, plant and equipment, net	34,692	33,988
Patents, net of accumulated amortization of $5,534 and $5,295	319	558
Goodwill	1,843	1,843
Non-current deferred income tax asset	505	754
Non-current notes receivable, net of allowance of $0	3,706	6,131
Other assets	1,210	2,233
Total assets	196,801	163,496
LIABILITIES AND STOCKHOLDERS' EQUITY
Notes payable and current maturities of long-term debt		440
Accounts payable trade	5,042	3,809
Accrued expenses and other current liabilities	11,384	10,793
Deferred revenue	774	1,311
Deferred income tax liability	82
Income tax payable	399	2,056
Total current liabilities	17,681	18,409
Long-term debt, net of current maturities		7,260
Non-current deferred income tax liability	2,107	1,241
Total liabilities	19,788	26,910
Commitments and contingencies
Stockholders' equity:
Preferred stock, 1,000,000 shares authorized, no shares issued and outstanding
Common stock, $.01 par value, 20,000,000 shares authorized, 6,351,258 and 6,117,358 shares issued and outstanding	64	61
Additional paid-in capital	57,446	47,059
Retained earnings	119,333	89,622
Accumulated other comprehensive income (loss)	170	(156)
Total stockholders' equity	177,013	136,586
Total liabilities and stockholders' equity	$ 196,801	$ 163,496