Suncore Joint Venture (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			0 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2013	Oct. 31, 2013	Nov. 30, 2011	Aug. 06, 2012 CPV	Sep. 30, 2012 CPV	Mar. 31, 2014 Suncore	Mar. 31, 2013 Suncore	Mar. 31, 2014 Suncore	Mar. 31, 2013 Suncore	Sep. 30, 2013 Suncore	Jun. 30, 2013 Suncore	Mar. 31, 2014 Emcore Solar New Mexico	Sep. 30, 2013 Emcore Solar New Mexico
CPV Solar Cell License Agreement:
License agreement, expected proceeds over term		$ 0.8	$ 2.5
Licenses Revenue	0.8
Summarized Financial Information:
Proceeds from sale of assets				2.8
Prepaid expense and other assets, current, portion of sales price of productive assets					2.8
Equity method investment, revenue						0.1	2.9	0.9	5.5
Equity method investment												0.4	0.3
Equity method investment, ownership percentage											40.00%
Equity method investment, purchase price											4.8
Equity method investment, sale of interest, deferred revenue										3.3
Gain on sale of equity method investment										$ 4.8