Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Allowances for doubtful accounts	$ 352	$ 279
Preferred Stock, par value	$ 0.001	$ 0.001
Preferred Stock, shares authorized	1,000,000	1,000,000
Preferred Stock, shares issued	93,232	102,054
Preferred Stock, shares outstanding	93,232	102,054
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	55,211,327	48,216,480
Treasury stock, shares	29,990	29,990