Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000us-gaap_PreferredStockSharesAuthorized	10,000,000us-gaap_PreferredStockSharesAuthorized
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	75,000,000us-gaap_CommonStockSharesAuthorized	75,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued (in shares)	31,950,813us-gaap_CommonStockSharesIssued	23,765,180us-gaap_CommonStockSharesIssued
Common stock, shares outstanding (in shares)	31,950,813us-gaap_CommonStockSharesOutstanding	23,765,180us-gaap_CommonStockSharesOutstanding
Series A Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares issued (in shares)	0	71
Preferred stock, shares outstanding (in shares)	0	71
Series B Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares issued (in shares)	100	1,650
Preferred stock, shares outstanding (in shares)	100	1,650

Face amount or stated value per share of common stock.

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