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401(k) Retirement Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
401(k) Retirement Plan [Abstract]
Retirement plan, employer contribution amount	$ 265,000	$ 279,000	$ 244,000

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- References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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