Anuvu Annual report pursuant to Section 13 and 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Contingently Issuable Shares (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2017	Aug. 31, 2016
Liability Warrants
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Common stock price (in usd per share)	$ 2.29
Exercise price (in usd per share)	$ 11.50
Expected term (in years)	1 month 2 days
Expected volatility rate (as a percent)	199.40%
Risk free rate (as a percent)	1.89%
Expected dividend rate (as a percent)	0.00%
Discount for lack of marketability (as a percent)	0.00%
Price Per Share Scenario One \| UMG Recordings \| Common Stock
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Share Price (in usd per share)	$ 10	$ 10.00	$ 10.00	$ 10
Common stock price (in usd per share)	$ 2.29
Expected term (in years)	10 years 3 months
Expected volatility rate (as a percent)	54.00%
Expected dividend rate (as a percent)	0.00%
Discount for lack of marketability (as a percent)	29.50%
Price Per Share Scenario Two \| UMG Recordings \| Common Stock
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Share Price (in usd per share)	$ 12	$ 12.00	$ 12.00	$ 12
Common stock price (in usd per share)	$ 2.29
Expected term (in years)	11 years 6 months 7 days
Expected volatility rate (as a percent)	54.00%
Expected dividend rate (as a percent)	0.00%
Discount for lack of marketability (as a percent)	30.10%