Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation of statutory U.S. federal tax rate	35.00%	35.00%
Effective tax rate	(0.10%)	(15.90%)
Gross decreases in tax positions	$ 0	$ 0
Decreases related to settlements with taxing authorities	0	0
Interest expense as a result of Gross increases unrecognized tax benefit	74,000	74,000
Net decrease to interest expense	$ 0	$ 0
Income tax examination, description	The Company is subject to taxation in the U.S. and various state jurisdictions. As of December 31, 2016, we were subject to examination in the U.S. federal tax jurisdiction for the 2013 through 2015 tax years and in various state jurisdictions for the 2005 through 2015 tax years. We are currently under federal examination for tax years 2010 through 2012 related to credits claimed
Maximum [Member] | General Business Credits [Member]
Income Tax Contingency [Line Items]
Reasonably possible decrease in unrecognized tax benefits within the next 12 months	$ 1,200,000