Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plan - Schedule of Stock Option Activity (Detail)

v3.20.1
Stock Incentive Plan - Schedule of Stock Option Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Shares      
Beginning Balance 1,980,972    
Ending Balance 1,860,722 1,980,972  
Exercisable at end of period 1,248,844    
Weighted Average Exercise Price      
Ending Balance $ 4.39    
Weighted Average Remaining Contractual Term      
Contractual term 3 years 7 months 6 days    
Employee Stock Option [Member]      
Shares      
Beginning Balance 1,980,972 1,428,462  
Granted 88,750 650,000  
Exercised (200) (17,615)  
Forfeited or expired (208,800) (79,875)  
Ending Balance 1,860,722 1,980,972 1,428,462
Exercisable at end of period 1,248,844 1,055,716  
Expected to Vest 580,978 878,531  
Weighted Average Exercise Price      
Beginning Balance $ 4.63 $ 5.20  
Granted 1.63 3.30  
Exercised 2.38 2.49  
Forfeited or expired 5.77 4.42  
Ending Balance 4.39 4.63 $ 5.20
Exercisable at end of period 4.93 5.51  
Expected to Vest 4.40 4.65  
Weighted Average Grant Date Fair value      
Beginning Balance 2.61 2.96  
Granted 0.44 1.86  
Exercised 2.05 2.11  
Forfeited or expired 4.06 3.20  
Ending Balance 2.37 2.61 $ 2.96
Exercisable at end of period 2.78 3.38  
Expected to Vest $ 2.38 $ 2.63  
Weighted Average Remaining Contractual Term      
Contractual term 3 years 7 months 6 days 4 years 1 month 6 days 3 years 8 months 12 days
Exercisable at end of period 2 years 3 months 18 days 0 years  
Expected to Vest 3 years 6 months 0 years  
Aggregate Intrinsic Value      
Beginning Balance   $ 653  
Exercised   35  
Forfeited or expired $ 2 $ 28