Description of Business and Summary of Significant Accounting Policies (Textual) (Details)	3 Months Ended	12 Months Ended				12 Months Ended
	Dec. 31, 2011 USD ($) Distributor	Dec. 31, 2014 USD ($) manufacturing_location Segment	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 CHF	Dec. 31, 2014 High Reliability [Member] product_line	Dec. 31, 2014 China [Member] contract_manufacturer	Dec. 31, 2014 Minimum [Member]	Dec. 31, 2014 Maximum [Member]
Significant Accounting Policies [Line Items]
Manufacturing locations		3
Number of contract manufacturers							2
Number of product lines						3
Cash and cash equivalents	$ 29,289,000	$ 24,732,000	$ 30,647,000	$ 28,739,000
Number of distributors that the company offered extended payment terms	3
Number of distributors offered return rights and profit margin protection	1
Number of distributors that the company determined that revenue recognition criteria of SAB 101 and 104 were not met	4
Cumulative sales that have not yet been recognized as revenue		445,000	4,500,000
Consigned finished goods		184,000	2,490,000
Total deferred revenue and customer deposits		703,000	1,043,000
Estimated useful lives of property and equipment								3 years	10 years
Leasehold improvements funded by landlords		2,500,000	2,700,000
Deferred rent related to leasehold improvements funding by landlords		2,700,000	2,700,000
Standard product warranty, term, minimum		1 year
Standard product warranty, term, maximum		4 years
FDIC insurance limit		250,000
Switzerland non-government financial institutions insured amount					100,000
Research and development expense		26,320,000	22,542,000	21,700,000
Third party funding offset		1,000,000	1,300,000	1,900,000
Advertising expense		1,400,000	884,000	1,200,000
Shipping and handling expense		1,500,000	1,300,000	1,400,000
Number of operating segments		1
Product Warranty Accrual, Current		$ 716,000	$ 180,000