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STATEMENTS OF CASH FLOWS (USD $)
 9 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Operating activities:    
Net loss $ (5,804,976) $ (4,829,969)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Stock-based compensation expense 2,045,767 1,983,870
Accretion and amortization on debt securities 154,010 199,440
Depreciation and amortization 209,257 185,485
Provision for doubtful accounts (1,773) 702
Changes in assets and liabilities:    
Accounts receivable 526,702 (234,517)
Other assets (171,990) (219,152)
Accounts payable 1,624,875 920,412
Accrued payroll and related taxes 511,717 219,366
Deferred revenue, current portion 1,053,998 795,903
Other liabilities 1,476,228 (47,154)
Net cash provided by (used in) operating activities 1,623,815 (1,025,614)
Investing activities:    
Purchases of investments (4,059,036) (8,174,049)
Sales and maturities of investments 5,340,734 9,335,005
Purchases of property and equipment (1,278,334) (213,299)
Net cash provided by investing activities 3,364 947,657
Financing activities:    
Proceeds from the issuance of common stock, net of issuance costs of $1,122,549 and $0, respectively 13,877,447  
Proceeds from exercise of stock options 751,440 626,246
Principal payments on capital lease obligations (12,524) (10,991)
Net cash provided by financing activities 14,616,363 615,255
Net increase in cash and cash equivalents 16,243,542 537,298
Cash and cash equivalents at beginning of period 6,702,090 5,655,716
Cash and cash equivalents at end of period 22,945,632 6,193,014
Supplemental disclosures of cash flow information:    
Cash paid for interest 6,231 8,071
Cash paid for income taxes 800 800
Supplemental disclosures of non-cash investing and financing activities:    
Unrealized holding gain on available for sale investments 2,945 8,977
Cashless exercise of options and warrants 125 399
Cashless settlement of restricted stock units 16  
Capital lease obligations incurred   $ 95,388