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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
 9 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Net income (loss) $ 2,600,304 $ (1,668,164)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 147,534 106,485
Provision for doubtful accounts 5,716 (400)
Warranty provision 147,887 (834)
Inventory obsolescence 19,032 (219,419)
Share-based compensation 488,958 582,058
Loss on sale or impairment of patents 6,980 5,138
Changes in operating assets and liabilities:    
Accounts receivable 1,204,313 4,351,696
Inventories (163,281) (1,913,407)
Prepaid expenses and other 454,185 (24,674)
Prepaid expenses and other - noncurrent 140,625 140,625
Accounts payable (944,129) (86,671)
Warranty settlements (40,975) (11,585)
Accrued and other liabilities 1,860,328 (30,927)
Net cash provided by operating activities 5,927,477 1,229,921
Capital expenditures (242,483) (134,349)
Patent costs paid (6,348) (2,734)
Net cash used in investing activities (248,831) (137,083)
Repurchase of common stock (476,494)  
Proceeds from exercise of stock options 193,064 105,228
Net cash (used in) provided by financing activities (283,430) 105,228
Net increase in cash 5,395,216 1,198,066
Cash, beginning of period 15,805,195 13,859,505
Cash, end of period 21,200,411 15,057,571
Supplemental Disclosure of Cash Flow Information    
Cash paid (refunded) for taxes $ 325 $ (38,724)