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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) $ 1,986,801 $ (5,866,134) $ 200,268
Adjustments to reconcile net income to net cash provided by (used in) operating activities:      
Depreciation and amortization 493,361 570,314 576,478
Share-based compensation expense:      
Stock options 68,172 316,369 660,136
Stock awards 183,222 149,952 150,055
Tax adjustment from share-based compensation (7,899) (54,055) (252,688)
Provision for (recovery) loss on unbilled receivables   1,237,841 3,680,679
(Gain) loss on disposal of property and equipment 3,605 (61,817) 78
Excess and obsolete inventory cost   225,742 196,205
Deferred income taxes 494,016 2,743,616 (648,456)
(Increase) decrease in:      
Accounts receivable (2,116,941) 2,025,168 69,571
Unbilled receivables 2,322,537 2,267,678 (4,566,965)
Inventories 951,488 647,728 (1,289,478)
Prepaid expenses and other current assets 371,684 (250,331) (107,899)
Other non-current assets   (75,300) 105,886
Increase (decrease) in:      
Accounts payable 67,790 (966,671) 30,515
Accrued expenses (678,623) (1,323,609) 557,222
Income taxes payable   (415,328) (152,608)
Deferred revenue (577,160) 230,426 78,795
Net cash provided (used in) by operating activities 3,562,053 1,401,589 (712,206)
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchases of property and equipment (352,762) (188,509) (719,523)
Proceeds from the sale of property and equipment 1,108 69,545 601
Net cash (used in) investing activities (351,654) (118,964) (718,922)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Proceeds from exercise of stock options   39,000 259,505
Purchases of treasury stock (724,777) (254,170)  
Net cash (used in) provided by financing activities (724,777) (215,170) 259,505
Net increase (decrease) in cash and cash equivalents 2,485,622 1,067,455 (1,171,623)
Cash and cash equivalents, beginning of year 16,282,039 15,214,584 16,386,207
Cash and cash equivalents, end of year 18,767,661 $ 16,282,039 15,214,584
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION      
Cash paid for income tax 175,000   $ 770,000
Cash received from income tax refund $ 364,836