SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
ALLOWANCE FOR DOUBTFUL ACCOUNTS
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Balance at beginning of period	$ 406	$ 424	$ 378
Additions charged to income	221	63	267
Deductions	(13)	(10)	(149)
Other Adjustments	(195)	(71)	(72)
Balance at end of period	419	406	424
WARRANTY RESERVE
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Balance at beginning of period	443	592	597
Additions charged to income	43	175	756
Deductions	(156)	(134)	(761)
Other Adjustments	(116)	(190)	0
Balance at end of period	214	443	592
INVENTORY RESERVE
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Balance at beginning of period	337	157	225
Additions charged to income	2,714	856	77
Deductions	(1,322)	(676)	(145)
Balance at end of period	$ 1,729	$ 337	$ 157