Alico, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Narrative (Details)

Stockholders' Equity - Narrative (Details) - USD ($)							3 Months Ended		6 Months Ended
Stockholders' Equity - Narrative (Details) - USD ($)	Oct. 11, 2019	Oct. 25, 2018	Oct. 03, 2018	Sep. 07, 2018	Sep. 05, 2018	Dec. 31, 2016	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Oct. 10, 2019	Sep. 30, 2019	Feb. 27, 2015
Class of Stock [Line Items]
Number of shares authorized to be repurchased (up to)											7,000
Stock compensation expense							$ 162,000	$ 355,000	$ 238,000	$ 476,000
Shares issued (in dollars per share)			$ 34.00
Shares issued (in shares)			752,234
Cost of shares			$ 25,575,956
Restricted Stock
Class of Stock [Line Items]
Stock compensation expense							26,000	52,000	26,000	52,000
Unrecognized expense							17,000		$ 17,000			$ 69,000
Unrecognized compensation cost, expected recognition period									2 months 12 days
Options
Class of Stock [Line Items]
Stock compensation expense							301,000	$ 383,000	$ 229,000	$ 518,000
Unrecognized expense							$ 496,000		$ 496,000			$ 502,000
Unrecognized compensation cost, expected recognition period									1 year 8 months 19 days
2015 Option Grants
Class of Stock [Line Items]
Number of shares authorized to be repurchased (up to)													1,250,000
2015 Option Grants \| Minimum
Class of Stock [Line Items]
Award vesting period									1 year
2015 Option Grants \| Maximum
Class of Stock [Line Items]
Award vesting period									6 years
2020 Option Grants
Class of Stock [Line Items]
Granted (in shares)	118,000
Shares issued (in dollars per share)	$ 33.96
Period following an executive's termination of employment for a number of reasons	18 months
Period following an executive's termination of employment without cause	12 months
Share price (in dollars per share)							$ 31.04		$ 31.04
Percentage of options									25.00%
2020 Option Grants \| Tranche One
Class of Stock [Line Items]
Period of consecutive trading days	20 days
Amount per share (in dollars per share)	$ 35.00
Percentage of options	25.00%
2020 Option Grants \| Tranche Two
Class of Stock [Line Items]
Period of consecutive trading days	20 days
Amount per share (in dollars per share)	$ 40.00
Percentage of options	25.00%
2020 Option Grants \| Tranche Three
Class of Stock [Line Items]
Period of consecutive trading days	20 days
Amount per share (in dollars per share)	$ 45.00
Percentage of options	25.00%
2020 Option Grants \| Tranche Four
Class of Stock [Line Items]
Period of consecutive trading days	20 days
Amount per share (in dollars per share)	$ 50.00
Percentage of options	25.00%
2020 Option Grants \| Options
Class of Stock [Line Items]
Grants in period, weighted average (in dollars per share)									$ 3.20
2020 Option Grants \| Maximum
Class of Stock [Line Items]
Share price (in dollars per share)							35.00		35.00
2019 Option Grants
Class of Stock [Line Items]
Shares issued (in dollars per share)		$ 33.34
Period following an executive's termination of employment for a number of reasons		18 months
Period following an executive's termination of employment without cause		12 months
Share price (in dollars per share)							31.04		$ 31.04
Number of awards vesting (in shares)									0
2019 Option Grants \| Tranche One
Class of Stock [Line Items]
Period of consecutive trading days		20 days
Amount per share (in dollars per share)		$ 40.00
Number of awards vesting (in shares)		3,333
2019 Option Grants \| Tranche Two
Class of Stock [Line Items]
Period of consecutive trading days		20 days
Amount per share (in dollars per share)		$ 45.00
Number of awards vesting (in shares)		3,333
2019 Option Grants \| Tranche Three
Class of Stock [Line Items]
Period of consecutive trading days		20 days
Amount per share (in dollars per share)		$ 50.00
Number of awards vesting (in shares)		3,334
2019 Option Grants \| Options
Class of Stock [Line Items]
Grants in period, weighted average (in dollars per share)									$ 7.10
2019 Option Grants \| Maximum
Class of Stock [Line Items]
Share price (in dollars per share)							40.00		$ 40.00
2018 Option Grants
Class of Stock [Line Items]
Stock compensation expense									$ (823,000)
Shares issued (in dollars per share)				$ 33.60
Period following an executive's termination of employment for a number of reasons				18 months
Period following an executive's termination of employment without cause				12 months
Share price (in dollars per share)							31.04		$ 31.04
Percentage of options									25.00%
2018 Option Grants \| Tranche One
Class of Stock [Line Items]
Period of consecutive trading days				20 years
Amount per share (in dollars per share)				$ 35.00
Percentage of options				25.00%
2018 Option Grants \| Tranche Two
Class of Stock [Line Items]
Period of consecutive trading days				20 years
Amount per share (in dollars per share)				$ 40.00
Percentage of options				25.00%
2018 Option Grants \| Tranche Three
Class of Stock [Line Items]
Period of consecutive trading days				20 years
Amount per share (in dollars per share)				$ 45.00
Percentage of options				25.00%
2018 Option Grants \| Tranche Four
Class of Stock [Line Items]
Period of consecutive trading days				20 years
Amount per share (in dollars per share)				$ 50.00
Percentage of options				25.00%
2018 Option Grants \| Maximum
Class of Stock [Line Items]
Share price (in dollars per share)							35.00		$ 35.00
2016 Option Grants
Class of Stock [Line Items]
Shares issued (in dollars per share)						$ 27.15
Period of consecutive trading days						20 days
Period following an executive's termination of employment for a number of reasons						18 months
Share price (in dollars per share)							31.04		$ 31.04
Number of awards vesting (in shares)									0
2016 Option Grants \| Tranche One
Class of Stock [Line Items]
Amount per share (in dollars per share)						$ 60.00
Percentage of options						25.00%
2016 Option Grants \| Tranche Two
Class of Stock [Line Items]
Amount per share (in dollars per share)						$ 75.00
Percentage of options						25.00%
2016 Option Grants \| Tranche Three
Class of Stock [Line Items]
Amount per share (in dollars per share)						$ 90.00
Percentage of options						25.00%
2016 Option Grants \| Tranche Four
Class of Stock [Line Items]
Amount per share (in dollars per share)						$ 105.00
Percentage of options						25.00%
2016 Option Grants \| Maximum
Class of Stock [Line Items]
Share price (in dollars per share)							60.00		$ 60.00
2019 Modified Option Grants \| Options
Class of Stock [Line Items]
Grants in period, weighted average (in dollars per share)									1.40
2019 Modified Option Grants \| Maximum
Class of Stock [Line Items]
Share price (in dollars per share)							$ 40.00		$ 40.00
Chief Executive Officer \| 2018 Option Grants
Class of Stock [Line Items]
Granted (in shares)				210,000
Chief Executive Officer \| 2018 Option Grants \| Tranche One
Class of Stock [Line Items]
Period of consecutive trading days									20 days
Amount per share (in dollars per share)									$ 35.00
Number of shares expected to vest (in shares)									26,250
Chief Executive Officer \| 2018 Option Grants \| Tranche Two
Class of Stock [Line Items]
Period of consecutive trading days									20 days
Amount per share (in dollars per share)									$ 40.00
Number of shares expected to vest (in shares)									26,250
Chief Executive Officer \| 2016 Option Grants
Class of Stock [Line Items]
Granted (in shares)						300,000
Chief Executive Officer \| 2019 Modified Option Grants
Class of Stock [Line Items]
Award expiration period									6 months
Chief Executive Officer \| 2019 Modified Option Grants \| Tranche One
Class of Stock [Line Items]
Number of shares expected to vest (in shares)									26,250
Board of Directors Chairman \| 2016 Option Grants
Class of Stock [Line Items]
Granted (in shares)						225,000
Shares forfeited (in shares)					187,500
Chief Financial Officer \| 2019 Option Grants
Class of Stock [Line Items]
Granted (in shares)		10,000
Chief Financial Officer \| 2018 Option Grants
Class of Stock [Line Items]
Granted (in shares)				90,000