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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 327,908 $ 139,421
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:    
Depreciation and amortization 104,135 116,078
Deferred income taxes   23
(Increase) decrease in:    
Accounts receivable (628,212) 230,824
Contract asset 80,182  
Inventories (201,769) (15,880)
Prepaid expenses and other current assets (42,109) (85,619)
Income taxes receivable (2,456) (478)
Increase (decrease) in:    
Accounts payable, net (101,437) (490,072)
Accrued expenses 218,758 286,667
Contract liability 4,355 (190,284)
Net cash used in by operating activities (240,645) (9,320)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property and equipment (17,429) (39,775)
Net cash used in investing activities (17,429) (39,775)
Net decrease in cash and cash equivalents (258,074) (49,095)
Cash and cash equivalents, beginning of year 22,416,830 20,390,713
Cash and cash equivalents, end of period 22,158,756 20,341,618
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION    
Cash paid for income tax $ 2,456 $ 456