Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Paramount Gold and Silver Corp. [Member]	Paramount Gold and Silver Corp. [Member] Common Stock	Paramount Gold and Silver Corp. [Member] Additional Paid-In Capital
Balances at Dec. 31, 2013	$ 1,730,567	$ 1,028	$ 2,781,164	$ (1,046,719)	$ (4,906)
Balances, in shares at Dec. 31, 2013		102,843
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,186,874)			(1,186,874)
Other comprehensive income (loss)	2,098				2,098
Common stock issued under stock-based compensation plans, net (in shares)		541
Common stock issued under stock-based compensation plans, net	8,537	$ 6	8,531
Balances at Dec. 31, 2014	554,328	$ 1,034	2,789,695	(2,233,593)	(2,808)
Balances, in shares at Dec. 31, 2014		103,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(367,183)			(367,183)
Other comprehensive income (loss)	(914)				(914)
Stock Issued During Period, Shares, Acquisitions							32,667
Stock Issued During Period, Value, Acquisitions						$ 188,817	$ 327	$ 188,490
Stock Issued During Period, Shares, Extinguishment of Debt		14,365
Stock Issued During Period, Value, Extinguishment of Debt	38,523	$ 144	38,379
Common stock issued under stock-based compensation plans, net (in shares)		923
Common stock issued under stock-based compensation plans, net	7,905	$ 8	7,897
Balances at Dec. 31, 2015	421,476	$ 1,513	3,024,461	(2,600,776)	(3,722)
Balances, in shares at Dec. 31, 2015		151,339
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	55,352			55,352
Other comprehensive income (loss)	1,234				1,234
Stock Issued During Period, Shares, Extinguishment of Debt		739
Stock Issued During Period, Value, Extinguishment of Debt	11,813	$ 7	11,806
Stock Issued During Period, Shares, New Issues		26,944
Stock Issued During Period, Value, New Issues	269,556	$ 270	269,286
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		1,911
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	9,056	$ 19	9,037
Balances at Dec. 31, 2016	$ 768,487	$ 1,809	$ 3,314,590	$ (2,545,424)	$ (2,488)
Balances, in shares at Dec. 31, 2016		180,933