Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended									6 Months Ended			9 Months Ended			12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 10, 2014	Jun. 28, 2010
Summary Of Significant Accounting Policies Details [LineItems]
Past Due Gross Accounts Receivable																$ 93,400
Sixty Days Past Due Gross Accounts Receivable																24,900
Inventory Write-down																8,800	$ 10,500	$ 2,100
Inventory Valuation Reserves	$ 20,000	$ 20,100	$ 24,100	$ 17,500	$ 15,100	$ 6,100				$ 20,100	$ 15,100		$ 20,000	$ 17,500		21,537	21,368	5,700
Research and Development Reserve																2,300	2,100
Depreciation	$ 5,100	$ 4,300	$ 5,000	$ 5,000	$ 3,600	$ 1,900	$ 1,700	$ 1,600	$ 1,600	$ 9,300	$ 5,500	$ 3,200	$ 14,400	$ 10,400	$ 4,900	$ 19,900	$ 14,200	$ 7,100
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	973,000	874	575,000			50,000	1,110	1,373	1,496,000	724	336	1,289	809,000		1,335	900,000	700,000	1,000,000
Available-for-sale Securities																$ 5,900
Unrealized Gain (Loss) on Securities																1,700
Available for Sale Securities Sold																2,600	$ 600
Unrealized Loss on Securities																1,600
Initial Value [Member]
Summary Of Significant Accounting Policies Details [LineItems]
Available-for-sale Securities																12,500
Kapoor Warrants [Member]
Summary Of Significant Accounting Policies Details [LineItems]
Fair Value of Warrants Original Value																				$ 17,900
Fair Value of Warrants Using Black-Scholes Valuation Model Minimum (in Shares)																				$ 2.49
Fair Value of Warrants Using Black-Scholes Valuation Model Maximum (in Dollars per share)																				$ 2.50
Outstanding stock warrants																			7,200,000
Proceeds from Warrant Exercises																	8,200
Prepaid Expenses and Other Current Assets [Member]
Summary Of Significant Accounting Policies Details [LineItems]
Restricted Cash and Investments, Noncurrent																$ 4,300
Other Noncurrent Assets [Member]
Summary Of Significant Accounting Policies Details [LineItems]
Restricted Cash and Investments, Noncurrent																	$ 2,900