Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Current Assets:
Cash and cash equivalents	$ 1,460,438	$ 1,283,673
Restricted cash		12,930
Marketable securities - held to maturity		360,253
Accounts receivable - trade	597,907	730,177
Inventories, net	1,554,938	1,358,344
Other current assets	171,909	135,693
Total current assets	3,785,192	3,881,070
Equipment and leasehold improvements	4,578,501	4,534,839
Less: accumulated depreciation and amortization	(4,519,469)	(4,481,085)
Equipment and leasehold improvements, net	59,032	53,754
Total Assets	3,844,224	3,934,824
Current Liabilities:
Accounts payable	131,384	109,224
Accrued liabilities:
Accrued compensation and related expenses	213,348	215,984
Customer deposits	53,091	53,886
Other current liabilities	83,720	55,376
Total current liabilities	481,543	434,470
Commitments and contingencies
Stockholders’ Equity:
Common stock, par value $0.10 per share; 7,000,000 shares authorized; 1,849,025 shares issued and outstanding at June 30, 2018 and 1,839,877 shares issued and outstanding at September 30, 2017	184,903	183,988
Additional paid-in capital	4,122,633	4,139,002
Accumulated deficit	(944,855)	(822,636)
Total stockholders’ equity	3,362,681	3,500,354
Total Liabilities and Stockholders’ Equity	$ 3,844,224	$ 3,934,824