Commitments and Contingencies (Details) (USD $)	3 Months Ended
	Mar. 31, 2014 sqft	Mar. 31, 2013	Dec. 01, 2013	Aug. 02, 2013 sqft
Product Warranty [Abstract]
Period of warranty	12 months
Change in warranty accrual [Roll Forward]
Beginning accrued warranty and related costs	$ 1,048,000	$ 588,000
Accruals for warranties issued	496,000	264,000
Adjustments related to pre-existing warranties including expirations and changes in estimates	(103,000)	166,000
Cost of warranty repair	(214,000)	(269,000)
Ending accrued warranty and related costs	1,227,000	749,000
Contractual Obligations [Abstract]
Area of property under long-term operating lease (in square feet)	27,760
Period of operating lease	7 years
Period to be lapsed for cancelling lease	5 years
Penalty payment	142,000
Revised facility area				20,767
Term of revised area contract			2 years
Savings as a result of revised facility area				382,000
Aggregate amount payable towards royalty	7,000,000
Term of royalty agreement	8 years
Outstanding contractual obligations [Abstract]
Total	3,682,000
Less than 1 year	1,063,000
1-3 years	1,527,000
4-5 years	1,040,000
More than 5 years	52,000
Operating leases [Member]
Outstanding contractual obligations [Abstract]
Total	557,000
Less than 1 year	263,000
1-3 years	208,000
4-5 years	34,000
More than 5 years	52,000
Royalty agreement [Member]
Outstanding contractual obligations [Abstract]
Total	3,125,000
Less than 1 year	800,000
1-3 years	1,319,000
4-5 years	1,006,000
More than 5 years	$ 0