CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Mar. 31, 2019	Sep. 30, 2018
Current assets
Cash and cash equivalents	$ 21,241,196	$ 20,390,713
Accounts receivable	2,620,448	3,449,893
Inventories	4,570,812	4,280,108
Prepaid expenses and other current assets	561,791	544,234
Total current assets	28,994,247	28,664,948
Property and equipment, net	8,640,532	8,786,737
Other assets	165,547	181,993
Total assets	37,800,326	37,633,678
Current liabilities
Accounts payable	985,935	1,529,792
Accrued expenses	1,459,089	1,463,021
Contract liability	525,899	356,801
Total current liabilities	2,970,923	3,349,614
Deferred income taxes	129,627	129,594
Total liabilities	3,100,550	3,479,208
Commitments and contingencies (See Note 6)
Shareholders' equity
Preferred stock, 10,000,000 shares authorized, $.001 par value, of which 200,000 shares are authorized as Class A Convertible stock. No shares issued and outstanding at March 31, 2019 and September 30, 2018
Common stock, $.001 par value: 75,000,000 shares authorized, 19,005,487 and 18,937,050 issued at March 31, 2019 and September 30, 2018	19,006	18,937
Additional paid-in capital	51,987,096	51,783,779
Retained earnings	4,062,211	3,720,291
Treasury stock, at cost, 2,096,451 shares at March 31, 2019 and September 30, 2018	(21,368,537)	(21,368,537)
Total shareholders' equity	34,699,776	34,154,470
Total liabilities and shareholders' equity	$ 37,800,326	$ 37,633,678