XML 63 R52.htm IDEA: XBRL DOCUMENT v3.19.2
Common stock, treasury stock and warrants - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 6 Months Ended
Nov. 30, 2017
Jun. 30, 2019
Dec. 31, 2018
Jul. 09, 2018
Equity [Line Items]        
Common stock, shares issued (in shares)   78,534,774 76,525,581  
Treasury stock, shares (in shares)   1,785,489 1,233,198  
Treasury stock, value   $ 6,351 $ 3,272  
Warrants outstanding (in shares)   2,398,776 2,498,776  
Common stock, par value (in usd per share)   $ 0.0005 $ 0.0005  
Reclassification of puttable option from liability to equity   $ 1,150    
Minimum        
Equity [Line Items]        
Exercise price of warrants (in usd per share)   $ 3.75    
Maximum        
Equity [Line Items]        
Exercise price of warrants (in usd per share)   $ 6    
Restricted Stock Units        
Equity [Line Items]        
Shares issued from vesting (in shares)   2,009,193    
Common shares withheld to pay withholding taxes (in shares)   552,291    
HIG Whitehorse SMAABFLP | Whitehorse Warrants        
Equity [Line Items]        
Exercise price of warrants (in usd per share)       $ 3.00
Number of securities called by warrants or rights (in shares)       46,667
Common stock, par value (in usd per share)       $ 0.0005
HIG Whitehorse SMA Holdings ILLC | Whitehorse Warrants        
Equity [Line Items]        
Exercise price of warrants (in usd per share)       $ 3.00
Number of securities called by warrants or rights (in shares)       66,666
Whitehorse Finance Inc | Whitehorse Warrants        
Equity [Line Items]        
Exercise price of warrants (in usd per share)       $ 3.00
Number of securities called by warrants or rights (in shares)       186,667
Put Rights | Whitehorse Warrants        
Equity [Line Items]        
Exercise price of warrants (in usd per share)       $ 3.8334
Warrants        
Equity [Line Items]        
Exercises in period (in shares) 300,000      
Additional Paid-in Capital        
Equity [Line Items]        
Reclassification of puttable option from liability to equity   $ 1,150