Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Allowance for doubtful accounts (in Dollars)	$ 233	$ 245
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in Shares)	25,000,000	25,000,000
Common stock, shares issued (in Shares)	3,885,822	1,511,133
Common stock, shares outstanding (in Shares)	3,885,822	1,511,133
Convertible Preferred Stock [Member]
Convertible preferred stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized (in Shares)	5,000,000	5,000,000
Series A Convertible Preferred Stock [Member]
Convertible preferred stock, shares authorized (in Shares)	4,000	4,000
Convertible preferred stock, shares issued (in Shares)	0	1,644
Convertible preferred stock, shares outstanding (in Shares)	0	1,644
Convertible preferred stock, issuance costs (in Dollars)	$ 0	$ 101
Series B Convertible Preferred Stock [Member]
Convertible preferred stock, shares authorized (in Shares)	2,000	2,000
Convertible preferred stock, shares issued (in Shares)	335	0
Convertible preferred stock, shares outstanding (in Shares)	335	0
Series C Convertible Preferred Stock [Member]
Convertible preferred stock, shares authorized (in Shares)	2,500	2,500
Convertible preferred stock, shares issued (in Shares)	2,400	0
Convertible preferred stock, shares outstanding (in Shares)	2,400	0