Inventories (Schedule of Inventory) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2013
Components of Inventory
Raw materials	$ 31,581,000		$ 13,953,000
Work-in-process	3,129,000		1,904,000
Finished goods	51,248,000		50,019,000
Inventories	85,958,000		65,876,000
Less reserve for excess and obsolete inventory	0		(2,744,000)
Inventories, net	85,958,000		63,132,000
Write-down for inventory	$ 2,000,000	$ 1,200,000