SWK Holdings Corporation and Summary of Significant Accounting Policies (Details 2) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net income	$ 25,929	$ 5,202
Weighted-average shares outstanding	12,796,000	12,852,000
Effect of dilutive securities	38,000	10,000
Weighted-average diluted shares	12,834,000	12,862,000
Basic net income per share	$ 2.03	$ 0.40
Diluted net income per share	$ 2.02	$ 0.40