| Cover | Jun. 11, 2021 |
| Affiliate, Collateralized Security [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 11, 2021 |
| Entity File Number | 001-39184 |
| Entity Registrant Name | SWK HOLDINGS CORPORATION |
| Entity Central Index Key | 0001089907 |
| Entity Tax Identification Number | 77-0435679 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 14755 Preston Road |
| Entity Address, Address Line Two | Suite 105 |
| Entity Address, City or Town | Dallas |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75254 |
| City Area Code | (972) |
| Local Phone Number | 687-7250 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock, Par or Stated Value Per Share | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Common Stock, par value |
| Trading Symbol | SWKH |
| Security Exchange Name | NASDAQ |
| Preferred Stock [Member] | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Preferred Stock |
| Trading Symbol | SWKH |
| Security Exchange Name | NASDAQ |
