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US SEISMIC SYSTEMS, INC. (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
US SEISMIC SYSTEMS, INC. [Abstract]
Preferred stock purchase USSI	$ 2,500
Preferred stock purchase USSI - May 2013	$ 2,500
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions	95.60%
Fully diluted ownership	87.90%

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- Definition

Fully diluted ownership

+ References

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- Definition

USSI preferred stock purchase

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- Definition

Preferred stock purchase USSI - May 2013

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- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section H

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