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Equity (Tables)
 12 Months Ended
Sep. 30, 2021
Equity [Abstract]  
Schedule of Stock Options Activity The following table summarizes stock option activity under the Equity Plans for the fiscal year ended September 30, 2021:
Number of
Shares		Weighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual Life
(in years)		Aggregate
Intrinsic
Value (*)
(in thousands)
Outstanding as of September 30, 202044,065 $5.14 
Granted— — 
Exercised(15,025)5.13 
Forfeited— — 
Expired(9,171)6.35 
Outstanding as of September 30, 202119,869 $4.59 3.75$57 
Exercisable as of September 30, 202119,869 $4.59 3.75$57 
Vested and expected to vest as of September 30, 202119,869 $4.59 3.75$57 
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(*)    Intrinsic value for stock options represents the “in-the-money” portion or the positive variance between a stock option’s exercise price and the underlying stock price. For the fiscal year ended September 30, 2020, the intrinsic value of options exercised was $0.
Schedule of Restricted Stock Activity
The following table summarizes the activity related to RSUs and RSAs subject to time-based vesting requirements for the fiscal year ended September 30, 2021:
RSUsRSAs
Number of SharesWeighted
Average Grant
Date Fair Value		Number of
Shares		Weighted
Average Grant
Date Fair Value
Non-vested as of September 30, 20201,548,045 $3.41 8,154 $8.20 
Granted1,045,673 5.55 — — 
Vested(598,986)3.43 (8,154)8.20 
Forfeited(189,878)3.70 — — 
Non-vested as of September 30, 20211,804,854 $4.61 — $— 
Schedule of Performance Share Activity
The following table summarizes the activity related to PSUs for the fiscal year ended September 30, 2021:
PSUs
Number of Shares
(at Target)		Weighted Average Grant Date Fair Value
Non-vested as of September 30, 2020868,500 $4.79 
Granted231,000 7.39 
Vested(6,086)7.91 
Forfeited(126,414)7.70 
Non-vested as of September 30, 2021967,000 $5.01 
Schedule of Stock-based Compensation Expense - By Award Type
The following table set forth stock-based compensation expense by award type:
For the Fiscal Year Ended September 30,
(in thousands)202120202019
Employee stock options$2 $13 $25 
RSUs and RSAs2,093 1,755 1,495 
PSUs and PRSAs1,396 1,243 685 
ESPP307 214 180 
Outside director equity awards and fees in common stock382 291 221 
Total stock-based compensation expense$4,180 $3,516 $2,606 
Schedule of Stock-based Compensation Expense - By Expense Type
The following table set forth stock-based compensation expense by expense type:
For the Fiscal Year Ended September 30,
(in thousands)202120202019
Cost of revenue$767 $692 $482 
Selling, general, and administrative2,590 2,155 1,478 
Research and development823 669 646 
Total stock-based compensation expense$4,180 $3,516 $2,606 
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the computation of basic and diluted earnings (loss) per share:
For the Fiscal Year Ended September 30,
(in thousands, except per share)202120202019
Numerator
Net income (loss)$25,643 $(7,000)$(35,984)
Denominator
Weighted average number of shares outstanding - basic34,020 29,136 27,983 
Effect of dilutive securities
Stock options7 — — 
PSUs, RSUs, and restricted stock1,762 — — 
Weighted average number of shares outstanding - diluted35,789 29,136 27,983 
Earnings (loss) per share - basic$0.75 $(0.24)$(1.29)
Earnings (loss) per share - diluted$0.72 $(0.24)$(1.29)
Weighted average antidilutive options, unvested RSUs and RSAs, unvested PSUs and ESPP shares excluded from the computation1951,109810
Schedule of Common Stock Reserved for Future Issuances
As of September 30, 2021, we had common stock reserved for the following future issuances:
Number of Common
Stock Shares Available for
Future Issuances
Exercise of outstanding stock options19,869 
Unvested RSUs and RSAs1,804,854 
Unvested PSUs and PRSAs (at 200% maximum payout)
1,934,000 
Issuance of stock-based awards under the Equity Plans1,751,234 
Purchases under the officer and director share purchase plan88,741 
Total reserved5,598,698