Quarterly report pursuant to Section 13 or 15(d)

Stock Option Plans (Summary of Stock Option Activity) (Detail)

v3.5.0.2
Stock Option Plans (Summary of Stock Option Activity) (Detail) - Employee Stock Option [Member]
6 Months Ended
Jun. 30, 2016
$ / shares
shares
Number of shares outstanding  
Outstanding, Beginning Balance | shares 1,022,789
Granted | shares 7,500
Exercised | shares 0
Expired or Forfeited | shares (31,523)
Outstanding, Ending Balance | shares 998,766
Weighted Average Exercise Price  
Outstanding, Beginning Balance | $ / shares $ 4.59
Granted | $ / shares 5.69
Exercised | $ / shares 0
Expired or Forfeited | $ / shares 5.58
Outstanding, Ending Balance | $ / shares $ 4.57