Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2012	Sep. 30, 2011
Cash and cash equivalents	$ 4,088,630	$ 5,628,156
Marketable securities	402,503	2,035,593
Accounts receivable, net	8,208,216	7,771,356
Parts, components, and materials	4,774,155	3,969,656
Work-in-process	2,058,457	2,032,176
Finished products	5,870,085	5,392,699
Inventory net	12,702,697	11,394,531
Recoverable income taxes	92,811	92,811
Prepaid expenses and other current assets	622,624	624,939
TOTAL CURRENT ASSETS	26,117,481	27,547,386
Property, plant and equipment	13,069,803	12,873,127
Less accumulated depreciation and amortization	(8,840,642)	(8,532,990)
Property, Plant and Equipment Net	4,229,161	4,340,137
Other assets	1,249,997	1,303,753
TOTAL ASSETS	31,596,639	33,191,276
Accounts payable	3,344,818	4,240,096
Accrued compensation and employee benefits	2,098,983	2,297,575
Accrued expenses	1,032,709	1,022,034
Unearned revenue	506,264	495,612
Income taxes payable	32,589	32,589
TOTAL CURRENT LIABILITIES	7,015,363	8,087,906
Unearned revenue	197,832	234,927
Other long-term liabilities	2,414,662	2,424,516
TOTAL LIABILITIES	9,627,857	10,747,349
Common stock, par value $.01	53,450	53,450
Capital in excess of par value	25,194,577	25,041,273
Retained earnings	1,079,249	1,641,720
Less treasury stock, at cost	(4,300,952)	(4,219,502)
Accumulated other comprehensive loss	(57,542)	(73,014)
TOTAL SHAREHOLDERS’ EQUITY	21,968,782	22,443,927
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 31,596,639	$ 33,191,276