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Net Income (loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net income (loss)	$ 3,832us-gaap_NetIncomeLoss	$ 3,700us-gaap_NetIncomeLoss	$ (390)us-gaap_NetIncomeLoss	$ (922)us-gaap_NetIncomeLoss	$ (1,427)us-gaap_NetIncomeLoss	$ (307)us-gaap_NetIncomeLoss	$ (757)us-gaap_NetIncomeLoss	$ (1,620)us-gaap_NetIncomeLoss	$ (1,605)us-gaap_NetIncomeLoss	$ (4,219)us-gaap_NetIncomeLoss	$ (744)us-gaap_NetIncomeLoss	$ (1,094)us-gaap_NetIncomeLoss	$ 6,220us-gaap_NetIncomeLoss	$ (4,112)us-gaap_NetIncomeLoss	$ (7,663)us-gaap_NetIncomeLoss
Denominator for basic earnings per share - weighted average shares													105,793,008	96,285,504	81,646,295
Effect of dilutive securities: Stock options and warrants outstanding and convertible debt (in shares)													7,502,496	0	0
Denominator for diluted earnings per share - weighted average shares adjusted for dilutive securities													113,295,504	96,285,504	81,646,295
Income (loss) per common share - basic (in dollars per share)	$ 0.04us-gaap_EarningsPerShareBasic	$ 0.03us-gaap_EarningsPerShareBasic	$ 0.00us-gaap_EarningsPerShareBasic	$ (0.01)us-gaap_EarningsPerShareBasic	$ (0.01)us-gaap_EarningsPerShareBasic	$ 0.00us-gaap_EarningsPerShareBasic	$ (0.01)us-gaap_EarningsPerShareBasic	$ (0.02)us-gaap_EarningsPerShareBasic	$ (0.01)us-gaap_EarningsPerShareBasic	$ (0.05)us-gaap_EarningsPerShareBasic	$ (0.01)us-gaap_EarningsPerShareBasic	$ (0.01)us-gaap_EarningsPerShareBasic	$ 0.06us-gaap_EarningsPerShareBasic	$ (0.04)us-gaap_EarningsPerShareBasic	$ (0.09)us-gaap_EarningsPerShareBasic
Income (loss) per common share - diluted (in dollars per share)	$ 0.03us-gaap_EarningsPerShareDiluted	$ 0.03us-gaap_EarningsPerShareDiluted	$ 0.00us-gaap_EarningsPerShareDiluted	$ (0.01)us-gaap_EarningsPerShareDiluted	$ (0.01)us-gaap_EarningsPerShareDiluted	$ 0.00us-gaap_EarningsPerShareDiluted	$ (0.01)us-gaap_EarningsPerShareDiluted	$ (0.02)us-gaap_EarningsPerShareDiluted	$ (0.01)us-gaap_EarningsPerShareDiluted	$ (0.05)us-gaap_EarningsPerShareDiluted	$ (0.01)us-gaap_EarningsPerShareDiluted	$ (0.01)us-gaap_EarningsPerShareDiluted	$ 0.05us-gaap_EarningsPerShareDiluted	$ (0.04)us-gaap_EarningsPerShareDiluted	$ (0.09)us-gaap_EarningsPerShareDiluted
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)													7,502,496
Outstanding Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)													7,036,088
Outstanding Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)													226,926
Restricted Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)													239,482