XML 43 R32.htm IDEA: XBRL DOCUMENT
v3.23.1

Stockholders' Equity (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2023
Equity [Abstract] |
Schedule of stock options using valuation assumptions | The expected term of options granted is derived from the output of the option valuation model and represents the period of time that options granted are expected to be outstanding; the range given below results from different timeframes for the various market conditions being met.
2020 Option Grant |  |  |
Expected Volatility |  |  | 26.0 | %
Expected Term (in years) |  | 3.61 |
Risk Free Rate |  |  | 1.60 | %
Schedule of treasury stock purchases and issuances | The following table illustrates the Company’s treasury stock activity for the six months ended March 31, 2023:
(in thousands, except share amounts) |  |  |  |  |  |
|  | Shares |  |  | Cost |
Balance as of September 30, 2022 |  |  | 829,150 |  |  | $ | 27,948 |
Issued to employees and directors, net |  |  | (12,497 | ) |  |  | (332 | )
Balance as of March 31, 2023 |  |  | 816,653 |  |  | $ | 27,616 |

X
- Definition Schedule Of Treasury Stock Transactions [Table Text Block]. + References No definition available. + Details
Name: | alco_ScheduleOfTreasuryStockTransactionsTableTextBlock
Namespace Prefix: | alco_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration