CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Consolidated net income (loss)	$ 3,644	$ 10,268
Other comprehensive income, net of tax:
Change in fair value of securities		1,820
Total other comprehensive income		1,820
Comprehensive income	3,644	12,088
Comprehensive income attributable to non-controlling interests		5,032
Comprehensive income attributable to SWK Holdings Corporation Stockholders	$ 3,644	$ 7,056