Stock-Based Compensation (Detail)	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price Per share, End of year | $ / shares	$ 2.77
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available for Grant, Beginning of year	71,431
Shares Available For Grant, Authorized	250,000
Shares Available For Grant, Options Forfeited	153,098
Shares Available For Grant, Options Granted	(305,000)
Shares Available For Grant, Options Expired	5,517
Shares Available for Grant, End of year	175,046
Number of Shares, Beginning of Year	369,887
Number Of Shares, Options Forfeited	(153,098)
Number of Shares, Options Granted	305,000
Number Of Shares, Options Expired	(7,017)
Number of Shares, End of Year	514,772
Number of Shares, Total vested and expected to vest shares (options)	514,772
Number of Shares, Total vested shares (options)	128,556
Weighted Average Exercise Price Per share, Beginning of year | $ / shares	$ 4.64
Weighted Average Exercise Price Per Share, Options Forfeited | $ / shares	3.1
Weighted Average Exercise Price Per Share, Options Granted | $ / shares	1.41
Weighted Average Exercise Price Per Share, Options Expired | $ / shares	34.73
Weighted Average Exercise Price Per share, End of year | $ / shares	2.77
Weighted Average Exercise Price Per Share, Total vested and expected to vest shares (options) | $ / shares	2.77
Weighted Average Exercise Price Per Share, Total vested shares (options) | $ / shares	$ 5.79