| Document and Entity Information | Aug. 24, 2022 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | GLADSTONE LAND Corp |
| Amendment Flag | false |
| Entity Central Index Key | 0001495240 |
| Document Type | 8-K |
| Document Period End Date | Aug. 24, 2022 |
| Entity Incorporation State Country Code | MD |
| Entity File Number | 001-35795 |
| Entity Tax Identification Number | 54-1892552 |
| Entity Address, Address Line One | 1521 Westbranch Drive |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | McLean |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 22102 |
| City Area Code | (703) |
| Local Phone Number | 287-5800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, $0.001 par value per share |
| Trading Symbol | LAND |
| Security Exchange Name | NASDAQ |
| Series B Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 6.00% Series B Cumulative Redeemable Preferred Stock, $0.001 par value per share |
| Trading Symbol | LANDO |
| Security Exchange Name | NASDAQ |
| Series D Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 5.00% Series D Cumulative Term Preferred Stock, $0.001 par value per share |
| Trading Symbol | LANDM |
| Security Exchange Name | NASDAQ |
