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Retirement Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation And Retirement Disclosure [Abstract]
Employer contribution for first 3% of employee contributions	100.00%
Employer contribution for next 2% of employee contributions	50.00%
Percentage of first specified employee contributions	3.00%
Percentage of next specified employee contributions	2.00%
Contribution for retirement plan	$ 40,768	$ 40,586	$ 47,094

X

- Definition

Percentage of first specified percentage of employee contribution.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of matching contribution for first specified percentage of employee contribution.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of matching contribution for next specified percentage of employee contribution.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of next specified percentage of employee contribution.

+ References

No definition available.

+ Details

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- References

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X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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