CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2018	Sep. 30, 2018
Current assets
Cash and cash equivalents	$ 20,341,618	$ 20,390,713
Accounts receivable	3,219,069	3,449,893
Inventories	4,295,988	4,280,108
Prepaid expenses and other current assets	630,331	544,234
Total current assets	28,487,006	28,664,948
Property and equipment, net	8,719,249	8,786,737
Other assets	173,178	181,993
Total assets	37,379,433	37,633,678
Current liabilities
Accounts payable	1,039,720	1,529,792
Accrued expenses	1,749,688	1,463,021
Contract liability	166,517	356,801
Total current liabilities	2,955,925	3,349,614
Deferred income taxes	129,617	129,594
Total liabilities	3,085,542	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 December 31, 2018 and September 30, 2018
Common stock, $.001 par value: 75,000,000 shares authorized, 18,937,050 issued at December 31, 2018 and September 30, 2018	18,937	18,937
Additional paid-in capital	51,783,779	51,783,779
Retained earnings	3,859,712	3,720,291
Treasury stock, at cost, 2,096,451 shares at December 31, 2018 and September 30, 2018	(21,368,537)	(21,368,537)
Total shareholders' equity	34,293,891	34,154,470
Total liabilities and shareholders' equity	$ 37,379,433	$ 37,633,678

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.