XML 18 R61.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stock Based Compensation - Summary of Restricted Stock and Restricted Stock Units (Detail) - Restricted Stock and Restricted Stock Units [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted Stock Beginning Balance, Shares 1,012 1,190 1,349
Granted 600 440 432
Restricted stock vested (555) (393) (482)
Forfeited (142) (225) (109)
Restricted Stock Ending Balance, Shares 915 1,012 1,190
Restricted stock units vested at December 31, 2019 134    
Restricted Stock Beginning Balance, Weighted Average Grant Date Fair Value $ 5.72 $ 4.75 $ 3.64
Granted, Weighted Average Grant Date Fair Value 2.36 6.86 6.77
Restricted stock vested, Weighted Average Grant Date Fair Value 5.33 4.76 3.62
Forfeited, Weighted Average Grant Date Fair Value 5.07 4.54 3.94
Restricted Stock Ending Balance, Weighted Average Grant Date Fair Value 3.85 $ 5.72 $ 4.75
Restricted stock units vested, Weighted Average Grant Date Fair Value $ 2.56    
Restricted Outstanding, Aggregate Intrinsic Value $ 1,409    
Restricted stock units vested, Aggregate Intrinsic Value $ 206    
Restricted Stock Outstanding, Average Remaining Vesting Period (months) 18 months 27 days    
Restricted Stock Outstanding, Unrecognized Compensation Expense $ 1,518