| Cover | Aug. 24, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 24, 2021 |
| Current Fiscal Year End Date | --03-31 |
| Entity File Number | 000-53361 |
| Entity Registrant Name | Ecoark Holdings, Inc. |
| Entity Central Index Key | 0001437491 |
| Entity Tax Identification Number | 30-0680177 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 303 Pearl Parkway Suite 200 |
| Entity Address, City or Town | San Antonio |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78215 |
| City Area Code | 800 |
| Local Phone Number | 762-7293 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | ZEST |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
