Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts receivable, allowance for doubtful accounts (in Dollars)	$ 0	$ 19
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, authorized	50,000,000	50,000,000
Common stock, issued	14,446,950	13,931,833
Common stock, outstanding	14,446,950	13,931,833
Convertible Preferred Stock [Member]
Convertible preferred stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock, authorized	5,000,000	5,000,000
Convertible preferred stock, issued	0	0
Convertible preferred stock, outstanding	0	0