SWK Holdings Corporation and Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2025 USD ($) employee segment partner	Dec. 31, 2024 USD ($) segment partner	Mar. 07, 2026 USD ($) party
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of full-time employees | employee	9
Number of reportable segments | segment	2	2
Collateral on foreign currency forward contract	$ 0	$ 2,750,000
Recognize any provision for interest receivable credit losses	0	0
Allowance for credit losses on interest	$ 0	$ 0
Number of business partners | partner	4	2
Revenue Benchmark | Customer Concentration Risk | One Customer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	33.90%
Revenue Benchmark | Customer Concentration Risk | Two Customers
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage		11.60%
Interest and Account Receivable | Business Partner Concentration Risk | Two Business Partners
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	48.30%
Interest and Account Receivable | Business Partner Concentration Risk | Three Business Partners
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage		36.60%
Pharmaceutical Development Revenues Benchmark | Customer Concentration Risk | Two Customers
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage	97.50%	96.00%
Subsequent Event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of parties with an executed transaction | party			58
Aggregate amount funded for financial products			$ 876,100,000