Quarterly report pursuant to Section 13 or 15(d)

Prepaid expenses and other current assets (Details)

v3.20.1
Prepaid expenses and other current assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 05, 2020
Aug. 28, 2019
Mar. 31, 2020
Dec. 31, 2019
Advertising Agreement [Abstract]        
Stock issued to third parties for services     $ 125  
IHeartMedia [Member]        
Advertising Agreement [Abstract]        
Committed usage amount of media inventory     1,700  
Prepaid advertising balance     3,000 $ 2,800
Advertising expenses incurred     0  
Prepaid Expenses and Other Current Assets [Member] | IHeartMedia [Member]        
Advertising Agreement [Abstract]        
Prepaid advertising balance     2,200 1,700
Other Noncurrent Assets [Member] | IHeartMedia [Member]        
Advertising Agreement [Abstract]        
Prepaid advertising balance     $ 800 $ 1,100
Common Stock [Member]        
Advertising Agreement [Abstract]        
Stock issued to third parties for services (in shares) 125,000   125,000  
Stock issued to third parties for services     $ 0  
Common Stock [Member] | IHeartMedia [Member]        
Advertising Agreement [Abstract]        
Stock issued to third parties for services (in shares) 125,000 1,000,000    
Stock issued to third parties for services $ 100 $ 3,400