XML 63 R48.htm IDEA: XBRL DOCUMENT v3.19.1
Share-Based Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Options    
Outstanding, beginning balance 985,224  
Granted 160,000  
Exercised 0  
Cancelled 0  
Outstanding, ending balance 1,145,224 985,224
Vested or expected to vest at March 31, 2019 1,145,224  
Exercisable at March 31, 2019 451,805  
Weighted Average Exercise Price    
Outstanding, beginning balance $ 2.24  
Granted 0  
Exercised 0  
Cancelled 0  
Outstanding, ending balance 2.24 $ 2.24
Vested or expected to vest at March 31, 2019 2.24  
Exercisable at March 31, 2019 $ 4.87  
Weighted Average Contractual Life (in Years)    
Outstanding at end of period 8 years 2 months 26 days 8 years 5 months 23 days
Vested or expected to vest at March 31, 2019 8 years 2 months 26 days  
Exercisable at March 31, 2019 6 years 10 months 13 days  
Aggregate Intrinsic Value    
Outstanding at end of period $ 1 $ 0
Vested or expected to vest at March 31, 2019 1  
Exercisable at March 31, 2019 $ 0