Long-term debt	12 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]
Long-term debt	Long-term debt In September 2017, the Company entered into a Fourth Amended and Restated Loan and Security Agreement (the Fourth Loan) with SVB for loan amounts aggregating up to $20.0 million in a series of three advances. The first advance provided a principal amount of $10.0 million, the second advance provided a principal amount of $5.0 million and the third advance provided a principal amount of $5.0 million during their respective draw down periods. The draw down periods for the second and third advances under this agreement have expired as of January 31, 2018 and June 30, 2018, respectively and were not utilized. The Company obtained a term loan under the only the first tranche in a principal amount of $10.0 million, which matured and was paid in full in December 2021. In connection with the first advance the Company issued a warrant to purchase 64,127 shares of common stock at an exercise price of $6.24 per share. The Fourth Loan contained a subjective acceleration clause under which the Fourth Loan could become due and payable to SVB in the event of a material adverse change in the Company’s business. The term of the loan was 51 months with an interest rate of prime plus 3.0% and a final payment fee of $0.7 million. The first advance, totaling $10.0 million, was drawn in September 2017 and comprised $7.8 million to refinance a prior loan and a new advance of $2.2 million. The debt provided for interest only payments through December 31, 2018 at which time monthly principal payments became due. In addition, the Company obtained a revolving loan facility for a principal amount of up to $10.0 million for which the principal amount outstanding under the revolving line would accrue interest at a floating per annum rate equal to one percentage point (1.0%) above the prime rate, which interest shall be payable monthly. The Company did not make any borrowings under the revolving loan facility which expired on December 31, 2021. The Company had no amounts outstanding under the loan facility at September 30, 2022.

In September 2017, the Company entered into a Fourth Amended and Restated Loan and Security Agreement (the Fourth Loan) with SVB for loan amounts aggregating up to $20.0 million in a series of three advances. The first advance provided a principal amount of $10.0 million, the second advance provided a principal amount of $5.0 million and the third advance provided a principal amount of $5.0 million during their respective draw down periods. The draw down periods for the second and third advances under this agreement have expired as of January 31, 2018 and June 30, 2018, respectively and were not utilized. The Company obtained a term loan under the only the first tranche in a principal amount of $10.0 million, which matured and was paid in full in December 2021.

In connection with the first advance the Company issued a warrant to purchase 64,127 shares of common stock at an exercise price of $6.24 per share. The Fourth Loan contained a subjective acceleration clause under which the Fourth Loan could become due and payable to SVB in the event of a material adverse change in the Company’s business. The term of the loan was 51 months with an interest rate of prime plus 3.0% and a final payment fee of $0.7 million.

The first advance, totaling $10.0 million, was drawn in September 2017 and comprised $7.8 million to refinance a prior loan and a new advance of $2.2 million. The debt provided for interest only payments through December 31, 2018 at which time monthly principal payments became due.

In addition, the Company obtained a revolving loan facility for a principal amount of up to $10.0 million for which the principal amount outstanding under the revolving line would accrue interest at a floating per annum rate equal to one percentage point (1.0%) above the prime rate, which interest shall be payable monthly. The Company did not make any borrowings under the revolving loan facility which expired on December 31, 2021.