Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Summary of total assets
Total assets	$ 182,257	$ 222,748
MRO [Member]
Summary of total assets
Total assets	170,923	194,422
OEM [Member]
Summary of total assets
Total assets	10,893	10,336
Segment total [Member]
Summary of total assets
Total assets	181,816	204,758
Corporate [Member]
Summary of total assets
Total assets	40	17,580
Discontinued operations [Member]
Summary of total assets
Total assets	$ 401	$ 410