Quarterly report pursuant to Section 13 or 15(d)

Summary of Warrant Activity (Detail)

v3.19.1
Summary of Warrant Activity (Detail) - Warrants
shares in Thousands
3 Months Ended
Mar. 31, 2019
$ / shares
shares
Shares  
Beginning Balance | shares 1,934
Granted or Issued | shares 0
Ending Balance | shares 1,934
Warrants exercisable at March 31, 2019 | shares 1,906
Weighted Average Exercise Price  
Beginning Balance | $ / shares $ 6.62
Granted or Issued | $ / shares 0
Ending Balance | $ / shares 6.62
Warrants exercisable at March 31, 2019 | $ / shares $ 6.43