CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND NONCONTROLLING INTEREST - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Deficit)	Noncontrolling Interest	Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 79,173	$ 37	$ 638,727	$ (59,547)	$ (500,044)		$ 79,173
Balances (shares) at Dec. 31, 2017		37,341
Common stock issued for exercise of stock options, employee stock purchase plan, and vesting of restricted shares, net of tax payments from shares withheld upon vesting of restricted stock (shares)		(387)
Common stock issued for exercise of stock options, employee stock purchase plan, and vesting of restricted shares, net of tax payments from shares withheld upon vesting of restricted stock	62		62				62
Equity in net loss of Napster investment	757		757				757
Stock-based compensation	2,508		2,508				2,508
Other comprehensive income (loss)	(1,571)			(1,571)			(1,571)
Net income (loss)	(24,989)				(24,989)		(24,989)
Net Income (Loss) Attributable to Noncontrolling Interest	0
Balances (shares) at Dec. 31, 2018		37,728
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(24,989)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	56,840	$ 37	641,930	(61,118)	(524,009)
Stockholders' Equity Attributable to Parent	56,840
Stockholders' Equity Attributable to Noncontrolling Interest	0
Common stock, $0.001 par value authorized 250,000 shares; issued and outstanding 38,227 shares in 2019 and 37,728 shares in 2018	37
Common stock issued for exercise of stock options, employee stock purchase plan, and vesting of restricted shares, net of tax payments from shares withheld upon vesting of restricted stock (shares)		(499)
Restricted Stock, Value, Shares Issued Net of Tax Withholdings		$ 1
Common stock issued for exercise of stock options, employee stock purchase plan, and vesting of restricted shares, net of tax payments from shares withheld upon vesting of restricted stock	109		110				109
Equity in net loss of Napster investment	0
Napster acquisition	(776)		(1,346)			$ 570	(1,346)
Stock-based compensation	2,881		2,881				2,881
Other comprehensive income (loss)	(205)			(205)			(205)
Net income (loss)	(20,001)						(20,001)
Net Income (Loss) Attributable to Noncontrolling Interest	(1,257)					(1,257)
Stockholders' Equity, Other	900		715			185	715
Balances (shares) at Dec. 31, 2019		38,227
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(21,258)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	38,273	$ 38	$ 644,070	$ (61,323)	$ (544,010)	$ (502)	$ 38,775
Stockholders' Equity Attributable to Parent	38,775
Stockholders' Equity Attributable to Noncontrolling Interest	(502)
Common stock, $0.001 par value authorized 250,000 shares; issued and outstanding 38,227 shares in 2019 and 37,728 shares in 2018	$ 38