Statements of Changes in Net Assets - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statements of Changes in Net Assets [Abstract]
Opening balance (in Shares)	2,400,000	2,750,000	3,450,000
Creations (in Shares)	400,000	450,000	400,000
Redemptions (in Shares)	(1,250,000)	(800,000)	(1,100,000)
Closing balance (in Shares)	1,550,000	2,400,000	2,750,000
Opening balance	$ 241,555	$ 178,252	$ 182,043
Net investment loss	(1,074)	(1,278)	(1,100)
Realized gain on investment in palladium	30,490	14,603	(1,919)
Change in unrealized gain/(loss) on investment in palladium	(13,150)	77,205	43,045
Creations	42,111	37,402	22,809
Redemptions	(114,467)	(64,629)	(66,626)
Closing balance	$ 185,465	$ 241,555	$ 178,252