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Equity Transactions - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for issuance (in shares) | 16,300,000 |  |
Reserve shares counted per share granted from fungible share pool (in shares) | 1.5 |  |
Remaining shares reserved for issuance (in shares) | 1,321,256 |  |
Stock compensation awards, total liability | $ 758 | $ 749 |
Stock compensation awards, current portion | $ 707 | $ 557 |
Weighted average grant date fair value of options granted (in dollars per share) | $ 2.70 | $ 2.04 | $ 3.58
Intrinsic value of options exercised | $ 307 | $ 30 | $ 24
Shares repurchased (in shares) | 0 |  |
Remaining repurchase amount | $ 10,100 |  |
Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options not yet exercisable (in shares) | 1,402,114 |  |
Options, service-based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options not yet exercisable (in shares) | 618,488 |  |
Unrecognized compensation cost | $ 1,400 |  |
Weighted average vesting period for unrecognized compensation cost | 2 years 10 months 24 days |  |
Options, service-based | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Stock options, expiration term | 5 years |  |
Options, service-based | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Stock options, expiration term | 10 years |  |
Options, service and performance or market based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options not yet exercisable (in shares) | 783,626 |  |
Restricted stock units and restricted stock awards, service based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Nonvested shares (in shares) | 748,670 |  |
Restricted stock units and restricted stock awards, service and performance or market based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Nonvested shares (in shares) | 1,175,310 |  |
Restricted stock unit, service based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average vesting period for unrecognized compensation cost | 2 years 6 months |  |
Unrecognized compensation cost, excluding options | $ 2,900 |  |
Restricted stock unit, service based | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Restricted stock unit, service based | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Stock appreciation rights |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Nonvested shares (in shares) | 290,207 |  |
Cash paid to settle stock appreciation rights | $ 500 | $ 200 | $ 300
Stock appreciation rights, weighted-average fair value (in dollars per share) | $ 1.7 | $ 0.8 |
Stock appreciation rights, service based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average vesting period for unrecognized compensation cost | 3 years 2 months 12 days |  |
Nonvested shares (in shares) | 164,088 |  |
Unrecognized compensation cost, excluding options | $ 100 |  |
Stock appreciation rights, service and performance or market based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Nonvested shares (in shares) | 126,119 |  |
Stock options, RSUs and RSAs, performance based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average vesting period for unrecognized compensation cost | 2 years 2 months 12 days |  |
Unrecognized compensation costs | $ 600 |  |
Stock options, RSUs and SARS, market based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Unrecognized compensation cost | $ 1,200 |  |
Weighted average vesting period for unrecognized compensation cost | 1 year 8 months 12 days |  |
Average share price term | 20 days |  |

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