Gladstone Land Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Equity - Additional Information (Details)

Equity - Additional Information (Details)							1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended	42 Months Ended
Equity - Additional Information (Details)	Apr. 03, 2020 $ / shares shares	Apr. 01, 2020 USD ($) security	Mar. 05, 2020 USD ($) shares	Feb. 20, 2020 $ / shares shares	May 31, 2018 $ / shares shares	Apr. 12, 2017 USD ($) security	Nov. 04, 2020 USD ($)	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) shares	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) shares	Dec. 31, 2019 $ / shares shares	Sep. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2020 shares	May 12, 2020 USD ($)	Feb. 19, 2020 shares	Jun. 30, 2019 shares	Dec. 31, 2018 shares	Aug. 07, 2015 USD ($)
Subsidiary, Sale of Stock [Line Items]
Stock authorized and unissued (in shares)				26,000,000
Common stock, shares authorized (in shares)				65,500,000				65,543,935		65,543,935		91,514,600	65,543,935			91,500,000
Common stock, par value (in dollars per share) \| $ / shares								$ 0.001		$ 0.001		$ 0.001	$ 0.001
Common stock, shares issued (in shares)								22,204,906		22,204,906		20,936,658	22,204,906
Common stock, shares outstanding (in shares)								22,204,906		22,204,906		20,936,658	22,204,906
Proceeds from issuance of preferred and common equity \| $										$ 55,231,000	$ 86,070,000
Payments of stock issuance costs \| $										3,636,000	$ 6,551,000
2017 Registration Statement
Subsidiary, Sale of Stock [Line Items]
Maximum number of securities that can be sold (in securities) \| security						2
Proceeds from issuance of preferred and common equity \| $													$ 117,400,000
2020 Registration Statement
Subsidiary, Sale of Stock [Line Items]
Maximum number of securities that can be sold (in securities) \| security		2
Proceeds from issuance of preferred and common equity \| $										9,200,000
Allowance for credit loss, writeoff \| $										$ 29,000
Common Stock
Subsidiary, Sale of Stock [Line Items]
Common stock, shares outstanding (in shares)								22,204,906	20,888,075	22,204,906	20,888,075	20,936,658	22,204,906	21,534,739			20,532,770	17,891,340
Common Stock \| 2017 Registration Statement
Subsidiary, Sale of Stock [Line Items]
Common stock, shares issued (in shares)								9,495,834		9,495,834			9,495,834
Securities allowed for issuance (amount up to) \| $						$ 300,000,000.0
Shares of common stock issued (in shares)													1,215,565
Common Stock \| 2020 Registration Statement
Subsidiary, Sale of Stock [Line Items]
Common stock, shares issued (in shares)								570,145		570,145			570,145
Securities allowed for issuance (amount up to) \| $		$ 1,000,000,000.0
Shares of common stock issued (in shares)										288,303
Series B Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred stock, shares authorized (in shares)								6,456,065		6,456,065		6,485,400	6,456,065
Preferred stock, par value (in dollars per share) \| $ / shares								$ 0.001		$ 0.001		$ 0.001	$ 0.001
Preferred stock, shares issued (in shares)								5,956,065		5,956,065		4,755,869	5,956,065
Preferred stock, shares outstanding (in shares)								5,956,065		5,956,065		4,755,869	5,956,065
Redemptions of Series B Preferred Stock \| $								$ 371,000	$ 48,000	$ 680,000	$ 214,000
Series B Preferred Stock \| 2017 Registration Statement
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of preferred and common equity \| $													$ 147,500,000
Series B Preferred Stock \| Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Dividend rate (as percent)					6.00%
Preferred stock, shares outstanding (in shares)								5,956,065	3,465,527	5,956,065	3,465,527	4,755,869	5,956,065	5,972,482			2,636,068	1,144,393
Average sales price of common stock sold (in dollars per share) \| $ / shares					$ 25.00
Stock redeemed (in shares)								16,417	2,120	29,335	9,520
Redemptions of Series B Preferred Stock \| $								$ 372,000	$ 48,000	$ 681,000	$ 214,000
Maximum amount of securities can be sold under shelf registration statement (in shares)					6,000,000
Gross proceeds \| $									20,487,000	30,148,000	57,529,000
Net proceeds from issuance of stock \| $									18,711,000	$ 27,664,000	52,440,000
Series B Preferred Stock \| Preferred Stock \| 2017 Registration Statement
Subsidiary, Sale of Stock [Line Items]
Common stock, shares issued (in shares)								6,000,000		6,000,000			6,000,000
Series B Preferred Stock \| Preferred Stock \| Series B Termination
Subsidiary, Sale of Stock [Line Items]
Securities allowed for issuance (amount up to) \| $			$ 147,500,000
Maximum amount of securities can be sold under shelf registration statement (in shares)			6,000,000
Gross proceeds \| $			$ 133,400,000
Net proceeds from issuance of stock \| $			$ 1,600,000
Series C Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred stock, shares authorized (in shares)								26,000,000		26,000,000		0	26,000,000
Preferred stock, par value (in dollars per share) \| $ / shares								$ 0.001		$ 0.001		$ 0.001	$ 0.001
Preferred stock, shares issued (in shares)								420,230		420,230		0	420,230
Preferred stock, shares outstanding (in shares)								420,230		420,230		0	420,230
Series C Preferred Stock \| 2020 Registration Statement
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of preferred and common equity \| $										$ 10,400,000
Series C Preferred Stock \| Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Dividend rate (as percent)				6.00%						6.00%
Preferred stock, shares authorized (in shares)	20,000,000			120,000
Preferred stock, par value (in dollars per share) \| $ / shares				$ 0.001
Preferred stock, shares outstanding (in shares)								420,230		420,230			420,230	130,702
Average sales price of common stock sold (in dollars per share) \| $ / shares	$ 25.00			$ 25.00
Preferred stock, shares authorized, pursuant to DRIP (in shares)	6,000,000
Maximum amount of securities can be sold under shelf registration statement (in shares)	26,000,000			400,000
Gross proceeds \| $								$ 7,184,000		$ 10,444,000
Net proceeds from issuance of stock \| $								$ 6,586,000		9,559,000
Sale of stock pursuant to DRIP (in dollars per share) \| $ / shares	$ 22.75			$ 22.75
Net proceeds from issuance of stock, excluding selling commissions and dealer-manager fees \| $										$ 225,000
Series C Preferred Stock \| Preferred Stock \| 2020 Registration Statement
Subsidiary, Sale of Stock [Line Items]
Common stock, shares issued (in shares)								420,196		420,196			420,196
Series C Preferred Stock \| Preferred Stock \| Series C Termination
Subsidiary, Sale of Stock [Line Items]
Preferred stock, shares authorized (in shares)	20,000,000
Common Stock \| ATM Program
Subsidiary, Sale of Stock [Line Items]
Gross proceeds \| $								$ 8,483,000	937,000	$ 14,638,000	1,830,000
Net proceeds from issuance of stock \| $								$ 8,398,000	$ 923,000	$ 14,491,000	$ 1,802,000
Common stock, value authorized \| $															$ 100,000,000.0				$ 30,000,000.0
OP Unit Holder
Subsidiary, Sale of Stock [Line Items]
Company's ownership percent (as percent)								100.00%		100.00%		98.60%	100.00%
Minimum period required to exercise, in months										12 months
Gladstone Land Limited Partnership
Subsidiary, Sale of Stock [Line Items]
OP units held by non-controlling limited partners (in shares)										0		288,303
Subsequent Event \| Series C Preferred Stock \| Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of preferred and common equity \| $							$ 4,638,000
Subsequent Event \| Common Stock
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of preferred and common equity \| $							$ 26,094,000