XML 97 R84.htm IDEA: XBRL DOCUMENT v3.20.4
Capital Structure - Additional Information (Details)
 12 Months Ended 48 Months Ended
May 18, 2020
USD ($)
Feb. 15, 2018
USD ($)
director
registration
member
vote
$ / shares
shares
Feb. 04, 2016
USD ($)
Dec. 31, 2020
USD ($)
vote
$ / shares
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Aug. 19, 2020
USD ($)
Dec. 31, 2019
$ / shares
shares
Class of Stock [Line Items]                  
Capital stock authorized (in shares) | shares       110,000,000     110,000,000    
Capital stock, par value (in dollars per share) | $ / shares       $ 0.0001     $ 0.0001    
Common stock, shares authorized (in shares) | shares       100,000,000     100,000,000   100,000,000
Preferred stock, shares authorized (in shares) | shares       10,000,000     10,000,000   10,000,000
Aggregate amount of offering               $ 250,000,000.0  
Dividends       $ 0          
Stock repurchased during period, value         $ 44,830,000        
Retirement of treasury stock (in shares) | shares         3,900,000        
Preferred stock, shares issued (in shares) | shares       250,000     250,000   217,000
Preferred stock, par value (in dollars per share) | $ / shares       $ 0.0001     $ 0.0001   $ 0.0001
Preferred stock, shares outstanding (in shares) | shares       250,000     250,000   217,000
Dividend rate, percentage   14.50%              
Convertible preferred stock, shares to be issued upon conversion (in shares) | shares   55.5556              
Convertible preferred stock, conversion price per share (in dollars per share) | $ / shares   $ 18.00              
Number of elected directors | director   4              
Number of board of director members | director   10              
Number of board of director members elected by preferred stock holders | director   2              
Number of board of directors agreed upon to be elected meeting independence criteria | director   4              
Number of board of directors elected meeting independence criteria | director   2              
Minimum number of board of director members that preferred stock holders can appoint pursuant to certification | director   1              
Maximum ownership threshold allowed for director election rights, percent   30.00%              
Demand registrations allowed under agreement | registration   3              
Demand registrations allowed under agreement annually | registration   2              
Demand registration, minimum percentage of shares   10.00%              
Chief Executive Officer                  
Class of Stock [Line Items]                  
Number of elected directors | director   1              
Board of Directors Chairman                  
Class of Stock [Line Items]                  
Number of elected directors | director   1              
Ten Percent or Greater Ownership                  
Class of Stock [Line Items]                  
Number of elected directors | member   2              
Preferred stock, ownership percentage   10.00%              
Greater than Five and Less than Ten Percent Ownership                  
Class of Stock [Line Items]                  
Number of elected directors | member   1              
Intralinks Holdings, Inc.                  
Class of Stock [Line Items]                  
Payment of reimbursement fees   $ 5,000,000.0              
Silver Private Holdings I, LLC                  
Class of Stock [Line Items]                  
Number of shares repurchased under program (in shares) | shares   5,994,667   5,994,667          
Preferred stock, shares issued (in shares) | shares   185,000              
Preferred stock, par value (in dollars per share) | $ / shares   $ 0.0001              
Preferred stock, liquidation preference (in dollars per share) | $ / shares   $ 1,000              
Consideration received on transaction   $ 97,700,000              
Fair value, approval threshold   10,000,000.0              
Fair market value of transaction, individual   5,000,000.0              
Fair market value of transaction, aggregate   10,000,000.0              
Capital expenditure threshold   $ 25,000,000.0              
Percentage ownership after conversion   19.90%              
Voting percentage threshold of ownership   19.99%              
Minimum number of board of director members that preferred stock holders can appoint pursuant to certification | director   2              
Siris LLC                  
Class of Stock [Line Items]                  
Advisory services, fee payable $ 110,000                
Increase in advisory services, fee payable $ 10,000                
Advisory services fee payable, percentage 20.00%                
Minimum | Greater than Five and Less than Ten Percent Ownership                  
Class of Stock [Line Items]                  
Preferred stock, ownership percentage   5.00%              
Maximum | Greater than Five and Less than Ten Percent Ownership                  
Class of Stock [Line Items]                  
Preferred stock, ownership percentage   10.00%              
Share Repurchase Program2016                  
Class of Stock [Line Items]                  
Stock repurchase program authorized amount     $ 100,000,000.0            
Number of shares repurchased under program (in shares) | shares           1,300,000 0    
Stock repurchased during period, value           $ 40,000,000.0      
Share Repurchase Program2016 | Minimum                  
Class of Stock [Line Items]                  
Stock repurchase program, period in force     12 months            
Share Repurchase Program2016 | Maximum                  
Class of Stock [Line Items]                  
Stock repurchase program, period in force     18 months            
Common Stock                  
Class of Stock [Line Items]                  
Number of votes per share (vote) | vote       1          
Series A Preferred Stock                  
Class of Stock [Line Items]                  
Number of votes per share (vote) | vote   1              
Preferred stock, shares issued (in shares) | shares   185,000              
Preferred stock, shares outstanding (in shares) | shares       250,432     250,432    
Preferred stock, dividends (in shares) | shares       65,432          
Preferred stock, redemption period   30 months              
Preferred stock, liquidation preference       $ 243,100,000     $ 243,100,000    
Preferred stock, redemption amount       $ 243,100,000     $ 243,100,000