Annual report pursuant to Section 13 and 15(d)

Equity Transactions - Stock Options Narrative (Details)

v3.20.1
Equity Transactions - Stock Options Narrative (Details)
 1 Months Ended 12 Months Ended
Apr. 15, 2020
$ / shares
shares
Jul. 27, 2016
shares
Mar. 31, 2017
$ / shares
shares
Aug. 31, 2016
shares
Dec. 31, 2013
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Apr. 14, 2020
shares
Aug. 31, 2018
$ / shares
Jun. 25, 2018
shares
Jan. 18, 2018
shares
Dec. 21, 2017
shares
Mar. 31, 2016
USD ($)
Class of Stock [Line Items]                          
Common stock, shares issued           3,837,920 3,793,413            
Common stock, par value (in dollars per share) | $ / shares           $ 0.0001 $ 0.0001            
Number of shares authorized for repurchase | $                         $ 50,000,000.0
Remaining shares amount authorized repurchase amount | $           $ 44,800,000              
2013 Equity Incentive Plan                          
Class of Stock [Line Items]                          
Number of grants available (in shares)         80,000                
Remaining stock-based awards available (in shares)                     282,812    
2017 Equity Incentive Plan                          
Class of Stock [Line Items]                          
Number of grants available (in shares)                   440,000   260,000  
Stock Options | 2013 Equity Incentive Plan                          
Class of Stock [Line Items]                          
Remaining stock-based awards available (in shares)                       83,914  
Vesting period           4 years              
Options exercised, intrinsic value | $           $ 0 $ 0            
Stock Options | 2013 Equity Incentive Plan | First Anniversary                          
Class of Stock [Line Items]                          
Percent of stock options vesting on the anniversary of commencement (as a percent)         25.00%                
Stock Options | 2013 Equity Incentive Plan | After First Anniversary                          
Class of Stock [Line Items]                          
Vesting period           3 years              
Percent of stock options vesting on the anniversary of commencement (as a percent)         2.083%                
Restricted stock units                          
Class of Stock [Line Items]                          
Non-options granted (in shares)           29,000              
Stock option term (in years)           4 years              
Percent of stock options vesting on the anniversary of commencement (as a percent)           25.00%              
Restricted stock units | Board of Directors                          
Class of Stock [Line Items]                          
Vesting period           12 months              
Common Stock | UMG Recordings | Price Per Share Scenario One                          
Class of Stock [Line Items]                          
Shares issued in period (in shares)     20,000 20,000                  
Share price (in usd per share) | $ / shares     $ 250.00     $ 250.00     $ 250.00        
Common Stock | UMG Recordings | Price Per Share Scenario Two                          
Class of Stock [Line Items]                          
Shares issued in period (in shares)     16,000 16,000                  
Share price (in usd per share) | $ / shares     $ 300.00     $ 300.00     $ 300.00        
Emerging Markets Communications LLC | EMC Employees | 2016 Inducement And Retention Stock Plan For EMC Employees | Share-based Compensation Award, Tranche Two                          
Class of Stock [Line Items]                          
Vesting period   3 years                      
Emerging Markets Communications LLC | Stock Options | EMC Employees | 2016 Inducement And Retention Stock Plan For EMC Employees                          
Class of Stock [Line Items]                          
Options granted (in shares)   2,904                      
Emerging Markets Communications LLC | Restricted stock units | EMC Employees | 2016 Inducement And Retention Stock Plan For EMC Employees                          
Class of Stock [Line Items]                          
Non-options granted (in shares)   2,950                      
Minimum | Stock Options | 2013 Equity Incentive Plan                          
Class of Stock [Line Items]                          
Stock option term (in years)           5 years              
Minimum | Stock Options | Board of Directors | 2013 Equity Incentive Plan                          
Class of Stock [Line Items]                          
Stock option term (in years)           5 years              
Maximum | Stock Options | 2013 Equity Incentive Plan                          
Class of Stock [Line Items]                          
Stock option term (in years)           7 years              
Maximum | Stock Options | Board of Directors | 2013 Equity Incentive Plan                          
Class of Stock [Line Items]                          
Stock option term (in years)           7 years              
Settled Litigation | UMG Recordings                          
Class of Stock [Line Items]                          
Issuance of common stock for legal settlements (in shares)       72,000                  
Subsequent Event                          
Class of Stock [Line Items]                          
Common stock, shares issued 3,717,797             92,944,935          
Common stock, par value (in dollars per share) | $ / shares $ 0.0001                        
Subsequent Event | Maximum                          
Class of Stock [Line Items]                          
Reverse stock split, conversion ratio 0.04