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Sale of HangXing	9 Months Ended
	Sep. 30, 2011
Sale Of Hangxing [Abstract]
Sale Of Hangxing [Text Block]	Note 8: Sale of HangXing In March 2011, the Company sold its 25% interest in HangXing International Automation Engineering Co. Ltd. (“HangXing”) back to the majority owner, China Aero-Polytechnology Establishment for $492 ($454 net of taxes withheld).  HangXing is a value-added reseller for PLC based industrial automation systems for steel manufacturing.  Acorn’s investment of approximately $250 in HangXing was made in 1995. The investment was entirely written-off in 1999.

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Sale of HangXing.

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The entire disclosure related to sale of HangXing.

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