SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ALLOWANCE FOR DOUBTFUL ACCOUNTS
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Balance at beginning of period	$ 419	$ 406	$ 424
Additions charged to income	140	221	63
Decreases	0	(13)	(10)
Other Adjustments	(17)	(195)	(71)
Balance at end of period	542	419	406
WARRANTY RESERVE
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Balance at beginning of period	188	421	540
Additions charged to income	162	0	172
Decreases	(216)	(117)	(101)
Other Adjustments	(4)	(116)	(190)
Balance at end of period	130	188	421
INVENTORY RESERVE
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Balance at beginning of period	1,729	337	157
Additions charged to income	1,606	2,714	856
Decreases	(77)	(1,322)	(676)
Other Adjustments	(141)	0	0
Balance at end of period	$ 3,117	$ 1,729	$ 337

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Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

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