Other Accrued Liabilities (Details 1) (USD $)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Accrued warranty
Balance at beginning of period	$ 74,000	$ 117,000
Accruals for warranties issued during the period		10,000
Warranty claims		(34,000)
Balance at end of period	$ 74,000	$ 93,000

Amount as of the balance sheet date of the aggregate extended product warranty liability. Does not include the ending balance for the standard product warranty liability.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph (c)(1),(c)(5)

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Name:	us-gaap_ExtendedProductWarrantyAccrual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant