CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2019	Sep. 30, 2019
Current assets
Cash and cash equivalents	$ 22,158,756	$ 22,416,830
Accounts receivable	2,976,749	2,348,537
Contract asset	0	80,182
Inventories	4,672,463	4,470,694
Prepaid expenses and other current assets	686,614	642,049
Total current assets	30,494,582	29,958,292
Property and equipment, net	8,365,477	8,444,692
Other assets	255,226	154,041
Total assets	39,115,285	38,557,025
Current liabilities
Accounts payable	977,636	1,079,073
Accrued expenses	1,414,045	1,110,918
Contract liability	33,586	29,231
Total current liabilities	2,425,267	2,219,222
Deferred income taxes	129,651	129,651
Other liabilities	24,307	0
Total liabilities	2,579,225	2,348,873
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, 2019 and September 30, 2019
Common stock, $.001 par value: 75,000,000 shares authorized, 19,005,487 issued at December 31, 2019 and September 30, 2019	19,006	19,006
Additional paid-in capital	51,987,096	51,987,096
Retained earnings	5,898,495	5,570,587
Treasury stock, at cost, 2,096,451 shares at December 31, 2019 and September 30, 2019	(21,368,537)	(21,368,537)
Total shareholders' equity	36,536,060	36,208,152
Total liabilities and shareholders' equity	$ 39,115,285	$ 38,557,025

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).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682