Equity - Summary of Total Stock-Based Compensation Expense Included in Selling General and Administrative Expenses on Statements of Operations (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
Total stock-based compensation expense | $ 48 | $ 112 |
Stock Options [Member] | ||
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
Total stock-based compensation expense | 17 | 84 |
Common Stock Awards [Member] | ||
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
Total stock-based compensation expense | $ 31 | $ 28 |